Meat of chickens, frozen

1. Scope and Applicability

This PCR applies to foreground data packages for raw meat of domestic chickens that has been slaughtered, dressed, chilled as needed, optionally cut or deboned, frozen, and held frozen for dispatch from the producing plant. It covers whole carcasses and meat cuts, with bone or boneless and with skin or skinless, when the product is sold as frozen chicken meat.

The foreground boundary begins when live chickens accepted for slaughter enter the slaughter facility and ends when conforming frozen chicken meat leaves plant-gate frozen storage. Farm production, feed production, and transport before acceptance are represented by linked upstream datasets. Downstream distribution, retail, cooking, consumption, and end-of-life after the plant gate are excluded. Edible offal sold separately, mechanically separated meat, cooked or otherwise manufactured chicken products, fresh or chilled chicken meat, and non-chicken poultry meat are outside the product category.

The data producer shall model the actual plant route. Cutting or deboning, glazing, primary packaging, secondary packaging, and refrigerant use are conditional where the declared product and technology require them. All non-reference inventory UUIDs remain unresolved until an exact Tiangong identity is selected; a semantic candidate in this PCR is not authority to reuse an unrelated UUID.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.meat-fish-fruits-vegetables-oils-and-fats.meat-of-chickens-frozen
classification_refs	CPC 3.0: 21141 — Meat of chickens, frozen
covered_products	Raw frozen meat of domestic chickens, including whole carcasses and cuts, bone-in or boneless, skin-on or skinless, with glazing and packaging states declared
excluded_products	Fresh or chilled chicken meat; edible chicken offal marketed separately; mechanically separated meat; cooked, seasoned, cured, canned, or otherwise manufactured chicken products; meat of other poultry species
representative_product	Frozen raw chicken meat, production mix at plant
production_route	Live-bird reception, slaughter and dressing, chilling, conditional cutting or deboning, freezing, conditional glazing and packaging, frozen storage, and plant-gate dispatch
market_state	Frozen finished product at the producing plant gate, maintained at -18 °C or colder unless a stricter applicable specification is declared

3. Reference Flow

Field	Value
What	Raw frozen meat of domestic chickens supplied at the producing plant gate
How much	1 kg net chicken meat, excluding packaging and excluding separately marketed co-products
How well	Product identity, cut, bone status, skin status, glazing fraction, packaging inclusion, and frozen-temperature condition are declared; product remains within the applicable food-safety and commercial specification
How long or cycle	Through the declared plant frozen-storage period up to dispatch; storage duration is reported
reference_flow_link	frozen_chicken_meat_at_plant_gate

Field	Value
Reference amount	1 kg
Reference product flow	Meat of chickens, frozen 00dbb94a-580a-4aae-979b-a7b1f4278116
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	species: domestic chicken; product form and cut; bone status; skin status; net meat mass basis; glazing mass fraction; packaging included or excluded; freezing technology; plant geography; production period; frozen-storage duration; dispatch temperature; allocation method

When constructing a foreground data package, every item in Required qualifiers shall be declared in dataset metadata, process notes, the reference flow comment, the product description, or an equivalent data-package field. Missing required qualifiers make the reference flow definition incomplete.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Report exactly 1 kg net frozen chicken meat as the quantitative reference. Exclude packaging and separately marketed co-products from the reference mass.
glaze_mass_separation	glazed product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Measure gross frozen mass and glaze mass separately; calculate net chicken-meat mass after subtracting glaze water. Declare the measurement method and sampling plan.
input_output_mass_consistency	live birds, meat intermediates, final meat, co-products, waste, and wastewater solids	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Convert all mass records to kg and retain wet/dry basis and measurement point. Reconcile each production period against the declared mass-balance perimeter.
frozen_temperature_condition	reference product and frozen storage	Temperature	°C	Record product temperature at freezer exit and dispatch, plus continuous or representative cold-store records. The declared frozen product shall be maintained at -18 °C or colder, subject only to applicable documented tolerances.
storage_duration_basis	frozen storage electricity and refrigerant losses	Time	day	Record average and range of residence time. Normalize duration-dependent inventories to the actual kg-day service before reporting them per 1 kg reference product.
energy_carrier_separation	electricity, fuels, steam, heat, and refrigeration	Energy or carrier-specific property	kWh, MJ, or carrier mass/volume	Preserve measured carrier units and conversion factors. Do not combine electricity, thermal energy, and refrigerant make-up into one undifferentiated energy total.

5. System Boundary

rule_id	Applies to	Rule	source_ids
boundary_required_stages	foreground plant operations	Include live-bird reception after facility acceptance, slaughter, dressing, carcass washing where used, chilling, conditional cutting or deboning, freezing, conditional glazing and packaging, frozen storage, cleaning and sanitation, on-site utilities allocated to these stages, and management of outputs crossing the foreground boundary.	codex-cxc-58-2005; codex-cxc-8-1976
boundary_upstream_live_birds	live-chicken supply	Represent farm production, feed, hatchery burdens where applicable, and transport before slaughter-facility acceptance through traceable upstream datasets; do not silently treat live birds as burden-free.	fao-leap-poultry-2016
boundary_cold_chain	freezing and plant frozen storage	Include electricity, thermal loads, refrigerant make-up and direct losses, defrosting, and duration-dependent frozen storage through plant-gate dispatch. Declare freezer technology, refrigerant, storage duration, and temperature records.	codex-cxc-8-1976
boundary_packaging	packaging operations	Include packaging materials and packaging waste when packaging occurs before the declared plant gate. If packaging is excluded from the reference product mass, it still remains an inventory input when inside the boundary.	codex-cxc-8-1976
boundary_wastewater_and_byproducts	slaughter, cutting, cleaning, and freezing	Record wastewater, edible co-products, animal by-products, condemned material, feathers, blood, bones, trimmings, product losses, and packaging waste separately when they cross the foreground boundary; link off-site treatment or recovery through appropriate datasets.	codex-cxc-58-2005
boundary_downstream_exclusion	downstream life-cycle stages	Exclude distribution after plant dispatch, retail, cooking, consumption, and post-consumer end-of-life. Disclose any study-specific extension instead of presenting it as PCR-conforming plant-gate scope.	fao-leap-poultry-2016

Boundary Abstraction

Field	Value
declared_starting_condition	Live domestic chickens accepted at the slaughter-facility reception point, with accepted mass, mortality or rejection, supplier, origin, and transport handover recorded
starting_condition_role	Foreground plant-gate input and link point to upstream poultry-production and inbound-transport datasets
product_classification_scope	Frozen raw chicken meat corresponding to CPC 3.0 code 21141; classification is mapping context and does not define canonical PCR identity
recursive_input_rule	A purchased frozen chicken-meat input within this product category shall be recorded as an upstream product input with supplier, product form, mass, and dataset reference; do not recursively reproduce its upstream production inside the same foreground process
upstream_dataset_requirement	Use traceable upstream datasets for live-chicken production, feed and hatchery burdens where applicable, inbound transport, purchased energy and materials, packaging, and off-site waste or wastewater treatment
disclosure	Declare plant geography, reporting period, product mix, product form, allocation method, cut and bone/skin states, glazing fraction, packaging boundary, freezer and refrigerant technology, frozen-storage duration, dispatch temperature, upstream dataset choices, exclusions, and data gaps

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
slaughter_dressing_chilling	Live-bird reception, slaughter, dressing, and primary chilling	required	Always included for chicken meat produced from live birds at the reporting plant	Foreground conversion of accepted live birds into chilled dressed meat and co-products	kg chilled dressed chicken output
cutting_deboning	Cutting and deboning	conditional	Include when the reference product is a cut, portion, or boneless product, or when cutting losses occur before freezing	Foreground product preparation	kg prepared chicken meat output
freezing_glazing_packaging	Freezing, conditional glazing, and packaging	required	Freezing is required; include glazing and each packaging level only when performed before the declared plant gate	Foreground conversion to frozen saleable form	kg frozen chicken meat before frozen storage
frozen_storage_dispatch	Frozen storage and plant-gate dispatch	required	Always include storage between freezer exit and dispatch; zero duration is allowed only with evidence	Foreground cold-store service and final reference output	kg reference product dispatched and kg-day stored

Process: Live-bird reception, slaughter, dressing, and primary chilling (slaughter_dressing_chilling)

Inputs

Product flows

Accepted live chickens (live_chickens_input)

Record live chickens after facility acceptance, including received mass, rejected or dead-on-arrival mass, supplier, origin, and upstream dataset link.

• Selected flow: Unresolved — select the exact Tiangong live-chicken product flow before publication
• Flow property / unit: Mass / kg
• Amount rule: accepted live-chicken mass assigned to the reporting product group
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference product dispatched
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_live_bird_intake
• Sources: fao-leap-poultry-2016
• Range: Provisional live-bird input QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1.1
  • Upper: 4.0
  • Unit: kg/kg reference product
  • Basis: accepted live-bird mass per 1 kg frozen chicken meat dispatched
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process and sanitation water (slaughter_water)

Record metered water used for scalding, washing, evisceration, chilling where applicable, cleaning, and sanitation, net of separately metered reuse.

• Selected flow: Unresolved — select the exact Tiangong water product flow before publication
• Flow property / unit: Volume or Mass / m3 or kg
• Amount rule: metered water allocated to this process
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Range: Provisional water-use QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.001
  • Upper: 0.05
  • Unit: m3/kg process output
  • Basis: metered process and sanitation water per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Purchased electricity (slaughter_electricity)

Record interval-metered or invoice-reconciled electricity for reception, slaughter, dressing, pumps, ventilation, chilling, cleaning, and allocated shared utilities.

• Selected flow: Unresolved — select a geography- and voltage-appropriate Tiangong electricity flow before publication
• Flow property / unit: Energy / kWh
• Amount rule: measured electricity allocated to this process
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Range: Provisional electricity QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.005
  • Upper: 1.5
  • Unit: kWh/kg process output
  • Basis: electricity per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Thermal energy carriers (slaughter_thermal_energy)

Record fuels, steam, or purchased heat separately by carrier for scalding, hot water, sanitation, and other thermal duties.

• Selected flow: Unresolved — select each exact Tiangong fuel, steam, or heat flow before publication
• Flow property / unit: Energy or carrier property / MJ or native carrier unit
• Amount rule: measured carrier use converted with documented factors
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_slaughter_records
• Range: Provisional thermal-energy QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 15
  • Unit: MJ/kg process output
  • Basis: delivered thermal energy per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Chilled dressed chicken intermediate (chilled_chicken_intermediate)

Record saleable chilled carcass or meat mass transferred to cutting or freezing, with temperature and bone/skin state.

• Selected flow: Unresolved — select an exact Tiangong intermediate product flow only if one exists
• Flow property / unit: Mass / kg
• Amount rule: weighed chilled dressed chicken transferred from the process
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per process batch
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Range: Provisional chilled-output yield QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.25
  • Upper: 0.95
  • Unit: kg/kg accepted live chickens
  • Basis: chilled dressed chicken mass divided by accepted live-chicken mass
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Edible co-products (edible_coproducts)

Record separately marketed edible co-products by product type and measured mass; do not include them in the reference product mass.

• Selected flow: Unresolved — select exact Tiangong co-product flows before publication
• Flow property / unit: Mass / kg
• Amount rule: measured edible co-product mass by type
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Range: Provisional edible co-product QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg/kg process output
  • Basis: edible co-product mass per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Animal by-products and condemned material (animal_byproducts_waste)

Record blood, feathers, inedible viscera, condemned material, mortality, and other animal by-products separately by destination and regulatory status.

• Selected flow: Unresolved — select exact Tiangong waste or recoverable-product flows according to destination
• Flow property / unit: Mass / kg
• Amount rule: measured mass by material and destination
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Sources: codex-cxc-58-2005
• Range: Provisional animal-by-product QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.05
  • Upper: 2.5
  • Unit: kg/kg process output
  • Basis: animal by-products and condemned material per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Slaughter wastewater (slaughter_wastewater)

Record wastewater volume or mass at the process boundary and retain sampling data for solids, organic load, nutrients, fats, and treatment destination where available.

• Selected flow: Unresolved — select the exact Tiangong wastewater flow or treatment input before publication
• Flow property / unit: Volume or Mass / m3 or kg
• Amount rule: metered discharge plus documented internal transfers to treatment
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg chilled dressed chicken output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_slaughter_records
• Range: Provisional wastewater QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.0005
  • Upper: 0.06
  • Unit: m3/kg process output
  • Basis: wastewater leaving this process per kg chilled dressed chicken
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Cutting and deboning (cutting_deboning)

Inputs

Product flows

Chilled chicken for cutting (cutting_chilled_input)

Record the mass and declared product state of chilled chicken entering cutting or deboning.

• Selected flow: Unresolved — select an exact Tiangong intermediate product flow only if one exists
• Flow property / unit: Mass / kg
• Amount rule: weighed chilled chicken issued to cutting
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per cutting batch
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cutting_records

Cutting electricity and water (cutting_utilities)

Record electricity and water as separate inventory flows; this combined card defines the shared collection requirement but shall project to separate concrete exchanges.

• Selected flow: Unresolved — select exact Tiangong electricity and water flows before publication
• Flow property / unit: Energy and Volume or Mass / kWh and m3 or kg
• Amount rule: metered utilities allocated to cutting and sanitation
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg prepared chicken meat output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cutting_records
• Range: Provisional combined utility QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 2
  • Unit: kWh-equivalent or m3 reported separately per kg process output
  • Basis: separate cutting electricity and water intensities screened against this broad per-flow upper bound
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Prepared chicken meat intermediate (prepared_chicken_intermediate)

Record prepared meat transferred to freezing, with cut, bone, skin, and net-meat states.

• Selected flow: Unresolved — select an exact Tiangong intermediate product flow only if one exists
• Flow property / unit: Mass / kg
• Amount rule: weighed prepared meat transferred to freezing
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per cutting batch
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cutting_records
• Range: Provisional cutting-yield QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.3
  • Upper: 1.0
  • Unit: kg/kg chilled chicken input
  • Basis: prepared meat mass divided by chilled chicken input mass
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Bones, skin, and trimmings (cutting_residues)

Record bones, skin, fat, trimmings, and rejected meat separately by whether they are co-products, recoverable materials, animal by-products, or wastes.

• Selected flow: Unresolved — select exact Tiangong product or waste flows according to actual destination
• Flow property / unit: Mass / kg
• Amount rule: measured residue mass by material and destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg prepared chicken meat output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cutting_records
• Range: Provisional cutting-residue QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1.5
  • Unit: kg/kg process output
  • Basis: cutting residues per kg prepared chicken meat
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Freezing, conditional glazing, and packaging (freezing_glazing_packaging)

Inputs

Product flows

Prepared chicken meat for freezing (freezing_meat_input)

Record net chicken-meat mass entering the freezer, excluding any subsequently added glaze and packaging.

• Selected flow: Unresolved — select an exact Tiangong chilled chicken intermediate only if one exists
• Flow property / unit: Mass / kg
• Amount rule: weighed net chicken meat entering freezing
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per freezing batch
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_freezing_packaging_records

Freezing electricity (freezing_electricity)

Record electricity for freezers, conveyors, pumps, fans, defrosting, and allocated refrigeration auxiliaries, separated from cold-store electricity.

• Selected flow: Unresolved — select a geography- and voltage-appropriate Tiangong electricity flow before publication
• Flow property / unit: Energy / kWh
• Amount rule: measured electricity allocated to freezing and packaging
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg frozen chicken meat before storage
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_freezing_packaging_records
• Sources: codex-cxc-8-1976
• Range: Provisional freezing-electricity QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.02
  • Upper: 3.0
  • Unit: kWh/kg process output
  • Basis: freezing and packaging electricity per kg frozen chicken meat before storage
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Glazing water (glazing_water)

Record potable water retained as glaze separately from process water when glazing is applied.

• Selected flow: Unresolved — select the exact Tiangong water product flow before publication
• Flow property / unit: Mass / kg
• Amount rule: gross frozen mass minus measured net chicken-meat mass, reconciled to applied glaze water
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_freezing_packaging_records
• Range: Provisional glazing-fraction QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg/kg net chicken meat
  • Basis: retained glaze water per kg net reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Packaging materials (packaging_materials)

Record primary, secondary, and tertiary packaging separately by material and mass when applied before the plant gate.

• Selected flow: Unresolved — select exact Tiangong packaging material flows before publication
• Flow property / unit: Mass / kg
• Amount rule: issued packaging minus returned and separately measured unused packaging
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_freezing_packaging_records
• Range: Provisional packaging QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg/kg net chicken meat
  • Basis: total packaging material per kg net reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Refrigerant make-up for freezing (freezing_refrigerant_makeup)

Record refrigerant type and make-up charged to freezing equipment, using a documented allocation of the site refrigerant balance.

• Selected flow: Unresolved — select the exact Tiangong refrigerant product flow before publication
• Flow property / unit: Mass / kg
• Amount rule: allocated annual refrigerant make-up from inventory reconciliation
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg frozen chicken meat before storage
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance
• Range: Provisional refrigerant make-up QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.05
  • Unit: kg/kg process output
  • Basis: allocated refrigerant make-up per kg frozen chicken meat before storage
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Frozen chicken meat before plant storage (frozen_chicken_before_storage)

Record net chicken-meat mass leaving freezing separately from glaze and packaging mass, with freezer-exit temperature.

• Selected flow: Unresolved — internal intermediate; do not reuse the reference-product UUID unless the exchange is the final plant-gate output
• Flow property / unit: Mass / kg
• Amount rule: net frozen chicken-meat mass after deducting glaze and packaging
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per freezing batch
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_freezing_packaging_records
• Sources: codex-cxc-8-1976

Waste flows

Packaging and product losses (freezing_packaging_waste)

Record damaged packaging, rejected frozen product, purge, spilled glaze, and other process losses separately by material and destination.

• Selected flow: Unresolved — select exact Tiangong waste flows before publication
• Flow property / unit: Mass / kg
• Amount rule: measured losses and stock reconciliation
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg frozen chicken meat before storage
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_freezing_packaging_records
• Range: Provisional freezing and packaging loss QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg/kg process output
  • Basis: material losses per kg frozen chicken meat before storage
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Direct refrigerant emissions from freezing (freezing_refrigerant_emissions)

Calculate direct emissions by refrigerant species from the reconciled make-up balance unless leak measurements provide a better basis.

• Selected flow: Unresolved — select the exact Tiangong elementary flow for each emitted refrigerant before publication
• Flow property / unit: Mass / kg
• Amount rule: allocated refrigerant loss by species after subtracting recovered and transferred quantities
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg frozen chicken meat before storage
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance
• Range: Provisional direct refrigerant-emission QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.05
  • Unit: kg/kg process output
  • Basis: direct refrigerant emissions per kg frozen chicken meat before storage
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Frozen storage and plant-gate dispatch (frozen_storage_dispatch)

Inputs

Product flows

Frozen chicken entering storage (stored_frozen_chicken_input)

Record net chicken-meat mass, glaze, packaging, entry temperature, storage location, and entry time.

• Selected flow: Unresolved — internal intermediate; do not use the reference-product UUID for an input without applying the recursive-input rule
• Flow property / unit: Mass / kg
• Amount rule: weighed or stock-reconciled net chicken-meat mass entering storage
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per storage lot
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cold_store_records

Cold-store electricity (cold_store_electricity)

Record electricity for refrigeration, fans, lighting, defrost, doors, and allocated auxiliaries during the declared plant storage period.

• Selected flow: Unresolved — select a geography- and voltage-appropriate Tiangong electricity flow before publication
• Flow property / unit: Energy / kWh
• Amount rule: metered cold-store electricity allocated by measured load or kg-day occupancy
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg-day of frozen chicken storage, then per 1 kg reference product using actual residence time
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_cold_store_records
• Sources: codex-cxc-8-1976
• Range: Provisional cold-store electricity QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.0001
  • Upper: 0.2
  • Unit: kWh/kg-day
  • Basis: cold-store electricity per kg-day occupancy
  • Basis kind: Storage duration (storage_duration)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Refrigerant make-up for cold storage (cold_store_refrigerant_makeup)

Record refrigerant type and the cold-store share of reconciled site make-up.

• Selected flow: Unresolved — select the exact Tiangong refrigerant product flow before publication
• Flow property / unit: Mass / kg
• Amount rule: allocated annual refrigerant make-up by equipment or cooling load
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg reference product using actual residence time
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance
• Range: Provisional cold-store refrigerant make-up QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.05
  • Unit: kg/kg reference product
  • Basis: allocated refrigerant make-up for the declared plant storage period
  • Basis kind: Storage duration (storage_duration)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Frozen chicken meat at plant gate (frozen_chicken_meat_at_plant_gate)

This is the sole reference-product output. Report net chicken-meat mass excluding glaze and packaging, together with all required qualifiers and dispatch temperature.

• Selected flow: Meat of chickens, frozen 00dbb94a-580a-4aae-979b-a7b1f4278116
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: fixed quantitative reference of 1 kg net frozen chicken meat dispatched
• Value mode: Fixed value (fixed_value)
• Specificity: Not applicable (not_applicable)
• Normalization basis: 1 kg reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Identity reference (identity_reference)
• Sources: codex-cxc-8-1976

Waste flows

Cold-store product losses (cold_store_product_loss)

Record damaged, thawed, rejected, or inventory-short frozen product separately by destination.

• Selected flow: Unresolved — select exact Tiangong product or waste flows according to destination
• Flow property / unit: Mass / kg
• Amount rule: stock reconciliation and rejection records
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference product dispatched
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cold_store_records
• Range: Provisional cold-store product-loss QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.2
  • Unit: kg/kg reference product
  • Basis: cold-store product losses per kg dispatched
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Direct refrigerant emissions from cold storage (cold_store_refrigerant_emissions)

Calculate direct emissions by refrigerant species from the reconciled cold-store make-up balance unless direct leak measurements are available.

• Selected flow: Unresolved — select the exact Tiangong elementary flow for each emitted refrigerant before publication
• Flow property / unit: Mass / kg
• Amount rule: allocated refrigerant loss by species after subtracting recovered and transferred quantities
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg reference product using actual residence time
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance
• Range: Provisional cold-store refrigerant-emission QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.05
  • Unit: kg/kg reference product
  • Basis: direct refrigerant emissions for the declared plant storage period
  • Basis kind: Storage duration (storage_duration)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_avoid_by_subdivision	separately metered processes and product lines	Avoid allocation by subdividing processes and directly assigning measured materials, energy, emissions, and wastes to the product line whenever technically feasible.	iso-14044-2006
allocation_co_products	edible co-products, recoverable animal by-products, and saleable cutting outputs	After subdivision, allocate remaining shared burdens using a documented physical causal relationship where one can be demonstrated. If no defensible causal relationship exists, use mass allocation on consistent wet-mass product outputs and report an economic-allocation sensitivity.	iso-14044-2006; fao-leap-poultry-2016
allocation_waste_treatment	wastes and animal by-products sent to treatment	Do not assign avoided-product credits without an explicitly declared substitution method and receiving-system boundary. Include treatment burdens and disclose any recovery credit separately.	iso-14044-2006
allocation_shared_utilities	refrigeration, boilers, water systems, sanitation, wastewater treatment, and site services	Allocate shared utilities using measured submetering where available; otherwise use a documented causal driver such as equipment load, operating hours, water volume, organic load, occupied cold-store kg-day, or throughput.	iso-14044-2006
allocation_consistency	reference product and all co-products	Apply the selected allocation hierarchy consistently across the reporting period and disclose product quantities, allocation factors, factor sum, prices and reference period when economic sensitivity is used, and any material exclusions.	iso-14044-2006; fao-leap-poultry-2016

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_live_bird_intake	slaughter_dressing_chilling	accepted live chickens and reception losses	weighbridge, receiving, supplier, and rejection records	received gross mass; tare; accepted mass; rejected mass; dead-on-arrival mass; supplier; origin; arrival time; upstream dataset reference	calibrated weighbridge or verified scales reconciled to receiving records	kg	each delivery	full reporting period	all suppliers and reception points serving the product group	sum accepted mass by supplier and product group; retain rejected and dead-on-arrival mass separately	scale calibration; ticket IDs; supplier traceability; completeness reconciliation
cp_slaughter_records	slaughter_dressing_chilling	utilities, meat output, co-products, animal by-products, and wastewater	meters, production logs, invoices, scales, waste manifests, and laboratory records	water; electricity; fuel/steam/heat; chilled output mass; co-product mass; waste mass; wastewater volume; wastewater quality; operating hours	direct meters and scales preferred; reconcile invoices and stock changes for shared utilities	native unit and kg output	shift or batch for production; at least monthly for reconciliations	representative continuous period covering seasonality, normally at least 12 months	all relevant slaughter, dressing, chilling, sanitation, and utility areas	allocate shared totals with declared causal driver; normalize to kg chilled output	meter calibration; invoice reconciliation; mass balance; laboratory QA; treatment manifests
cp_cutting_records	cutting_deboning	chilled input, prepared output, utilities, and residues	batch sheets, scales, meters, and waste records	chilled input mass; prepared output mass; cut; bone and skin state; electricity; water; bones; skin; trimmings; rejects	calibrated batch scales and submetering or documented allocation from site totals	kg, kWh, m3	each batch or shift	all cutting campaigns in reporting period	all included cutting and deboning lines	calculate yield and normalize utilities and residues to kg prepared output	scale calibration; batch reconciliation; product specification; residue destination evidence
cp_freezing_packaging_records	freezing_glazing_packaging	freezer input/output, electricity, glaze, packaging, losses, and temperature	batch scales, electricity meters, packaging issue records, temperature logger, and rejection records	net meat input; net frozen output; gross glazed mass; glaze mass; packaging by material; electricity; freezer-exit temperature; losses; freezer technology	calibrated scales, submetering, material issue reconciliation, and logged temperature measurements	kg, kWh, °C	each batch and continuous temperature logging	all freezing campaigns in reporting period	all freezers, glazing stations, and packaging lines serving the reference product	normalize to kg net frozen meat; keep glaze and packaging outside net meat mass	scale and meter calibration; packaging stock reconciliation; logger calibration; batch mass balance
cp_cold_store_records	frozen_storage_dispatch	occupancy, residence time, electricity, temperature, dispatch, and losses	warehouse management system, electricity meter, temperature logger, dispatch scale, and stock counts	lot mass; entry and exit time; location; electricity; temperature; defrost events; dispatched net mass; losses	lot tracking, calibrated dispatch scales, submetering, and continuous or justified representative temperature logging	kg, day, kg-day, kWh, °C	each lot; continuous temperature; monthly energy reconciliation	full reporting period including seasonal ambient conditions	all on-site frozen stores serving the reference product	allocate electricity by measured load or kg-day; normalize to actual lot residence time and kg dispatched	warehouse traceability; meter and logger calibration; stock reconciliation; excursion records
cp_refrigerant_balance	freezing_glazing_packaging; frozen_storage_dispatch	refrigerant make-up and direct emissions	refrigerant purchase, charge, recovery, service, transfer, and equipment records	refrigerant species; opening stock; purchases; charges; recovery; transfers; closing stock; equipment identity; cooling load or operating hours	annual mass-balance reconciliation supplemented by leak detection and service records	kg refrigerant	each service event with annual reconciliation	full reporting year	all refrigeration equipment serving included processes	calculate loss by species and allocate by direct equipment record, cooling load, or operating hours	purchase invoices; technician records; cylinder reconciliation; leak-test evidence

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	all foreground exchanges	normalized amount = exchange amount assigned to product group / net reference-product mass dispatched	assigned exchange amount; net dispatched meat mass	exchange amount per 1 kg reference product	iso-14044-2006
calc_net_meat_mass	glazed and packaged product	net chicken-meat mass = gross packaged product mass - packaging mass - retained glaze mass; verify with direct product specification and sampling	gross mass; packaging mass; glaze mass; sampling results	kg net chicken meat	codex-cxc-8-1976
calc_process_yield	slaughter, cutting, freezing, and storage	yield = qualifying process output mass / qualifying process input mass; keep co-products, waste, water gain, and losses as separate terms	input mass; output mass; co-product mass; waste mass; water gain; stock change	dimensionless yield and reconciled mass balance	codex-cxc-58-2005
calc_storage_service	frozen storage	kg-day = sum for each lot of net meat mass multiplied by residence time; allocated storage electricity = store electricity multiplied by product-group kg-day / total compatible kg-day	lot mass; entry time; exit time; store electricity; total occupancy	kg-day and kWh per kg reference product	codex-cxc-8-1976
calc_refrigerant_loss	freezing and cold storage	refrigerant loss by species = opening stock + purchases + received transfers - closing stock - recovered stock - outgoing transfers; allocate only the share serving included equipment	refrigerant inventory and service records; equipment allocation driver	kg direct refrigerant emission per kg reference product
calc_allocation_factors	co-products and shared utilities	calculate factors from the declared causal driver; verify that the complete factor set sums to 1 within rounding tolerance and retain unrounded factors	product quantities; causal driver; optional market values; shared inventory	documented allocation factors and sensitivity result	iso-14044-2006; fao-leap-poultry-2016

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	reference product and inventory flows	Verify the reference UUID exactly as specified. Resolve every other product, waste, elementary, flow-property, and unit-group identity against Tiangong before publication; retain semantic descriptions where identity remains unresolved.	Tiangong readback; identity review record
dq_temporal	all foreground records	Use one coherent reporting period that represents normal operation and captures relevant seasonality; normally target at least 12 months or justify a shorter campaign.	record coverage table; operating calendar; exception justification
dq_geographic_technology	facility and upstream datasets	Declare facility geography, freezer and refrigeration technology, refrigerant species, product route, and the geography and technology of material upstream datasets.	facility metadata; equipment register; dataset metadata
dq_completeness	mass, energy, water, co-products, wastes, wastewater, and refrigerants	Reconcile production, utility, stock, and waste records. Explain missing meters, estimated shares, exclusions, and any unresolved mass-balance difference.	meter and invoice reconciliation; mass balance; waste manifests; data-gap log
dq_temperature_traceability	freezing and cold storage	Retain calibrated freezer-exit and dispatch measurements plus continuous or justified representative storage records, including excursions and corrective actions.	temperature logs; calibration records; excursion reports; codex-cxc-8-1976
dq_hygiene_route	slaughter and dressing boundary	Confirm that included operations correspond to the actual slaughter, dressing, chilling, cutting, and handling route and that condemned material and hygiene-related cleaning flows are represented.	process flow diagram; production records; codex-cxc-58-2005
dq_provisional_ranges	all reasoned_estimate ranges	Treat broad ranges only as QA screens. Replace them with measured or source-backed ranges, or obtain explicit reviewer acceptance, before using them as publication-critical constraints.	range review log; accepted evidence references

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_identity	reference flow	Require product flow UUID 00dbb94a-580a-4aae-979b-a7b1f4278116, Mass UUID 93a60a56-a3c8-11da-a746-0800200b9a66, Units of mass UUID 93a60a57-a4c8-11da-a746-0800200c9a66, unit kg, and reference amount 1.
validate_reference_qualifiers	reference flow metadata	Fail completeness when any required qualifier is absent or when gross product, glaze, or packaging mass is substituted for net chicken-meat mass.	codex-cxc-8-1976
validate_product_scope	product identity	Reject fresh or chilled meat, edible offal marketed separately, mechanically separated meat, cooked or manufactured products, and non-chicken poultry from this PCR scope.
validate_process_coverage	process map and inventory	Require detailed inventories for slaughter/dressing/chilling, freezing/glazing/packaging, and frozen storage/dispatch; require cutting/deboning when the declared product route includes it.	codex-cxc-58-2005; codex-cxc-8-1976
validate_frozen_condition	freezer exit, storage, and dispatch	Require temperature records demonstrating -18 °C or colder for the declared frozen state, subject only to documented applicable tolerances; flag unexplained excursions.	codex-cxc-8-1976
validate_mass_balance	each process and reporting period	Check input mass, output meat, co-products, wastes, added glaze water, wastewater terms where measured, and stock changes; require explanation for material imbalance and prevent double counting of intermediates.	codex-cxc-58-2005
validate_inventory_identity	non-reference exchanges	Fail publication readiness when a semantic candidate is presented as a resolved Tiangong flow without exact UUID verification. Unresolved inventory UUIDs are acceptable only while lifecycle status remains candidate.
validate_allocation	shared burdens and co-products	Require declared allocation hierarchy, driver, complete factor set, unrounded factors, factor-sum check, product quantities, and economic sensitivity when mass allocation is used without a physical causal relation.	iso-14044-2006; fao-leap-poultry-2016
validate_cold_store_service	storage inventories	Require storage duration and kg-day basis; reject a duration-independent allocation when residence time materially differs among product groups and no alternative causal measurement is supplied.	codex-cxc-8-1976
validate_refrigerants	freezing and cold storage	Require refrigerant species, equipment scope, make-up/recovery balance, allocation method, and corresponding direct elementary emissions or an evidence-backed zero-loss statement.
validate_packaging_glaze	packaged or glazed product	Require separate masses for net chicken meat, glaze, and each packaging material; confirm that only net chicken meat forms the 1 kg reference amount.	codex-cxc-8-1976
validate_provisional_ranges	reasoned_estimate QA guardrails	Emit a review finding when a measured value falls outside a provisional guardrail; do not automatically replace the measured value or treat the guardrail as an allowed range.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground plant-gate production data package for frozen chicken meat, suitable after review for publication as a secondary_dataset or background_dataset
downstream_use	Construction of process datasets and lifecyclemodel projections for frozen chicken meat where product form, geography, technology, allocation, glazing, packaging, storage, and temperature conditions are compatible
allowed_use	Product carbon-footprint or LCA modelling, supply-chain inventory construction, benchmarking, and scenario analysis within the declared scope and data quality
excluded_use	Claims about fresh/chilled chicken, edible offal, other poultry species, cooked or manufactured products, retail or consumer stages, or geographies and technologies not represented without explicit adaptation
required_metadata	PCR id and version state; CPC mapping context; facility geography; reporting period; production route; product form; cut; bone and skin states; net-mass method; glaze fraction; packaging boundary; freezer technology; refrigerant; storage duration; dispatch temperature; allocation method; upstream datasets; unresolved identities; exclusions
required_quality_disclosure	Primary-data coverage; meter and scale calibration; temporal and site coverage; mass-balance result; allocation factors and sensitivity; cold-chain records; refrigerant reconciliation; wastewater and waste coverage; source-backed versus reasoned ranges; uncertainty and data gaps
update_trigger	Material change in product scope, plant route, freezer or refrigeration technology, refrigerant, packaging or glazing practice, allocation method, geography, upstream live-bird supply, storage duration, applicable regulation, verified Tiangong identities, or evidence replacing provisional ranges

11. Data Sources

Source id	Type	Reference	Used for
codex-cxc-58-2005	official_guidance	FAO/WHO Codex Alimentarius, Code of Hygienic Practice for Meat, CXC 58-2005, https://workspace.fao.org/sites/codex/Standards/CXC%2058-2005/CXC_058e.pdf (retrieved 2026-08-11)	Slaughter, dressing, cutting, chilling, hygiene-process decomposition, product and waste handling, temperature traceability, and validation requirements
codex-cxc-8-1976	official_guidance	FAO/WHO Codex Alimentarius, Code of Practice for the Processing and Handling of Quick Frozen Foods, CXC 8-1976, https://workspace.fao.org/sites/codex/Standards/CXC%208-1976/CXC_008e.pdf (retrieved 2026-08-11)	Quick-freezing and cold-chain boundary, -18 °C frozen condition, storage, temperature records, packaging/glazing handling, and validation
fao-leap-poultry-2016	official_guidance	FAO LEAP Partnership, Greenhouse gas emissions and fossil energy use from poultry supply chains: Guidelines for assessment, 2016, https://openknowledge.fao.org/handle/20.500.14283/i6421en (retrieved 2026-08-11)	Poultry supply-chain boundary, upstream dataset requirement, co-product and shared-burden method context, and data-quality framing
iso-14044-2006	standard	ISO 14044:2006, Environmental management — Life cycle assessment — Requirements and guidelines, https://www.iso.org/standard/38498.html (retrieved 2026-08-11)	LCI scope, allocation hierarchy, consistency, calculation, reporting, and review rules