Meat of pigs, frozen

1. Scope and Applicability

This PCR applies to edible meat of domestic pigs that leaves the reporting facility in a frozen state, including carcasses, half-carcasses, bone-in cuts, and boneless cuts. The foreground data package covers receipt of unfrozen pig meat, any on-site cutting or trimming needed for the declared product, packaging, freezing, frozen holding, and dispatch at the facility gate.

Pig breeding, feed production, animal husbandry, live-animal transport, slaughter, and dressing are upstream of the default foreground starting condition. They must be represented by linked upstream datasets appropriate to the incoming meat and must not be silently omitted. When one reporting organization operates those stages, their inventories remain separately identifiable and are linked to this frozen-meat foreground package. Downstream distribution beyond the dispatch gate, retail, thawing, cooking, consumption, and end-of-life are outside this PCR unless the study explicitly extends the boundary.

The PCR does not cover fresh or chilled pig meat sold without freezing, edible offal reported as a separate product, rendered fats, hides, prepared or preserved pork products, cooked pork, or mixed-species meat products. A producer shall declare the cut or carcass form, bone status, net product mass, packaging state, freezing technology, target dispatch temperature or temperature specification, storage duration, geography, and production period.

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-pigs-frozen
classification_refs	CPC 3.0: 21133 — Meat of pigs, frozen
covered_products	Edible frozen pig carcasses, half-carcasses, bone-in pork cuts, and boneless pork cuts whose reference output is net frozen pig meat
excluded_products	Fresh or chilled pig meat; separately marketed edible offal; rendered fats; hides; prepared, preserved, cooked, or mixed-species meat products
representative_product	Net frozen pork cuts at the freezing facility dispatch gate
production_route	Receipt of unfrozen pig meat; preparation and trimming as applicable; packaging; freezing; frozen holding; dispatch
market_state	Frozen edible meat, packaged or unpackaged as declared, at the facility dispatch gate

3. Reference Flow

Field	Value
What	Frozen edible pig meat supplied at the reporting facility dispatch gate
How much	1,000 kg net frozen pig meat, excluding transport packaging unless packaging is explicitly included in the declared product mass
How well	Conforming to the declared cut or carcass form, bone status, packaging state, freezing method, and dispatch temperature specification
How long or cycle	One production lot through receipt, preparation, freezing, and the declared frozen-storage period until dispatch
reference_flow_link	frozen_pork_reference_output

Field	Value
Reference amount	1,000 kg
Reference product flow	Meat of pigs, frozen e7b009bd-ea26-4617-9ccf-f14d12e2c0b6
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	pig species; carcass or cut form; bone-in or boneless status; edible-product status; net-mass convention; packaging state; freezing technology; target dispatch temperature or specification; frozen-storage duration; facility geography; production period

When constructing a foreground data package, the items listed in Required qualifiers must be declared in dataset metadata, process notes, reference flow comment, product description, or an equivalent data package field. Missing required qualifiers make the reference flow definition incomplete for that data package.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	Reference frozen pork output	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Report 1,000 kg net frozen pork. Exclude packaging from product mass unless the declared commercial specification includes it, in which case disclose the packaging mass separately.
incoming_meat_mass	Incoming unfrozen pig meat and intermediate meat	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use calibrated scale records on a consistent net-mass and temperature-state basis; record tare, bone status, and whether surface ice or glaze is included.
energy_conversion	Electricity and fuels	Energy or carrier-specific property	kWh for electricity; declared unit for fuel	Preserve measured billing or meter units and conversion factors. Do not substitute primary energy for delivered electricity without an explicit conversion and source.
temperature_time	Freezing and frozen storage	Temperature and elapsed time	°C and h or d	Record product or validated proxy temperature, equipment setpoint, freezing start and end times, and storage duration; declare the measurement location and sampling frequency.
refrigerant_mass	Refrigerant additions, recovery, and calculated releases	Mass	kg	Record each refrigerant by chemical or blend designation. Never combine different refrigerants into one mass row before calculating releases.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Unfrozen edible pig meat received at the freezing facility gate after upstream slaughter and dressing, with actual temperature, carcass or cut form, bone status, net mass, and upstream dataset reference declared
starting_condition_role	Purchased or internally transferred upstream product input to the frozen-meat foreground package
product_classification_scope	Frozen edible meat of pigs corresponding to CPC 3.0 code 21133; classification is mapping context and does not replace the semantic product boundary
recursive_input_rule	If frozen pig meat in the same category is used as an input, record it as a separately quantified technosphere input with its own upstream dataset and declared purpose; do not recursively reapply this PCR to hide the input
upstream_dataset_requirement	Link representative upstream datasets for pig production, live-animal transport, slaughter, dressing, and any off-site chilled transport embodied in the incoming unfrozen meat
disclosure	Disclose facility gates, incoming meat state, included preparation operations, freezing technology, packaging sequence, storage duration, cut-offs, allocation method, and any integrated upstream stages represented as separate linked inventories

rule_id	applies_to	rule	source_ids
sb_foreground_operations	frozen_pork_foreground	Include receipt and temperature-controlled handling, on-site cutting and trimming when performed, packaging, freezing, frozen storage until dispatch, cleaning attributable to these operations, electricity, fuels, water, refrigerant management, packaging, wastes, wastewater, and direct releases.	fao-meat-industry-2004; fao-leap-pig-2018
sb_upstream_linkage	incoming_unfrozen_pig_meat	Represent pig production, live-animal transport, slaughter, dressing, and off-site chilled transport through separately identifiable upstream datasets matching the declared incoming meat state.	fao-leap-pig-2018
sb_downstream_exclusion	post_dispatch_stages	Exclude transport beyond the dispatch gate, distribution, retail, thawing, cooking, consumption, and end-of-life unless the study explicitly extends the system and reports those stages separately.	fao-leap-pig-2018
sb_cutoff_disclosure	completeness_and_cutoffs	Draw and retain a process and material-flow map, disclose every cut-off, and justify exclusions; do not exclude a flow merely because its Tiangong UUID is unresolved.	fao-leap-pig-2018

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
meat_receipt_preparation	Unfrozen meat receipt and preparation	required	Always required; cutting, deboning, and trimming activities are included only when performed at the reporting facility	Foreground receipt, temperature-controlled handling, preparation, and material balance	kg prepared pig meat transferred to freezing
freezing_packaging	Packaging and freezing	required	Always required; record the actual order of packaging and freezing	Foreground conversion to frozen pork	1,000 kg net frozen pork leaving the freezing operation
frozen_storage_dispatch	Frozen storage and dispatch	required	Always required; storage duration may be zero only when direct dispatch is documented	Foreground frozen holding and facility-gate dispatch	1,000 kg net frozen pork dispatched

Process: Unfrozen meat receipt and preparation (meat_receipt_preparation)

Inputs

Product flows

Incoming unfrozen pig meat (incoming_unfrozen_pig_meat)

Unfrozen edible pig meat crosses the foreground gate from the declared upstream slaughter and dressing system. Its state and upstream dataset determine whether upstream burdens are complete.

• Selected flow: Unresolved — unfrozen pig carcass or cut input; do not use the frozen reference-product UUID
• Flow property / unit: Mass / kg
• Amount rule: measured net mass received and accepted for the lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_received_meat
• Range: Provisional incoming-meat mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1000
  • Upper: 2500
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Preparation and sanitation water (preparation_water)

Record metered or otherwise reconciled water used for product-contact preparation, equipment cleaning, and sanitation attributable to this process.

• Selected flow: Unresolved — water supply product flow
• Flow property / unit: Volume / m3
• Amount rule: measured attributable water withdrawal
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_wastewater
• Range: Provisional preparation-water QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 50
  • Unit: m3
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Prepared pig meat transferred to freezing (prepared_pig_meat)

Record the net mass of prepared pig meat transferred to the freezing operation, with the cut and bone status aligned to the reference product.

• Selected flow: Unresolved — prepared unfrozen pig meat intermediate
• Flow property / unit: Mass / kg
• Amount rule: measured net transfer mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_preparation_outputs
• Range: Provisional prepared-meat mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1000
  • Upper: 2200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Marketed trimming co-products (marketed_trimming_coproducts)

Record separately marketed edible or rendering-bound trimming outputs by destination and product role. Do not combine them with waste.

• Selected flow: Unresolved — trimming co-product by declared destination
• Flow property / unit: Mass / kg
• Amount rule: measured net co-product mass by type
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_preparation_outputs
• Range: Provisional co-product mass QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1000
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Preparation solids rejected to treatment (preparation_solid_waste)

Record non-marketed tissue, contaminated material, and floor or screening solids sent to a declared treatment route.

• Selected flow: Unresolved — animal-tissue preparation waste
• Flow property / unit: Mass / kg
• Amount rule: measured or mass-balance-reconciled waste mass by treatment route
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_preparation_outputs
• Range: Provisional preparation-waste QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1000
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Preparation wastewater (preparation_wastewater)

Record wastewater leaving the foreground process before any on-site or off-site treatment, avoiding double counting with water retained in product or collected solids.

• Selected flow: Unresolved — wastewater to declared treatment
• Flow property / unit: Volume / m3
• Amount rule: measured discharge or calculated water balance
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water_wastewater
• Range: Provisional wastewater QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 50
  • Unit: m3
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Process: Packaging and freezing (freezing_packaging)

Inputs

Product flows

Prepared pig meat input (prepared_pig_meat_input)

Record the net prepared-meat mass entering packaging and freezing. It shall reconcile with the transfer output from meat_receipt_preparation.

• Selected flow: Unresolved — prepared unfrozen pig meat intermediate
• Flow property / unit: Mass / kg
• Amount rule: measured net transfer mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_preparation_outputs
• Range: Provisional freezing-input mass QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1000
  • Upper: 2200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Freezing electricity (freezing_electricity)

Record dedicated electricity meters where available; otherwise allocate a reconciled facility meter to freezing using documented equipment runtime and power data.

• Selected flow: Unresolved — market electricity supplied to facility
• Flow property / unit: Energy / kWh
• Amount rule: measured or calculated electricity attributable to packaging and freezing
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_freezing_energy_temperature
• Range: Provisional freezing-electricity QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 50
  • Upper: 5000
  • Unit: kWh
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Refrigerant make-up (refrigerant_makeup)

Record each refrigerant addition separately by chemical or blend designation and retain service records for the refrigeration system used by the lot.

• Selected flow: Unresolved — refrigerant product by declared chemical or blend
• Flow property / unit: Mass / kg
• Amount rule: measured refrigerant added during the reporting period and attributed to freezing
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• 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: 20
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Product packaging materials (product_packaging)

Record primary, secondary, and tertiary packaging by material and net mass, separating reusable packaging from consumed packaging.

• Selected flow: Unresolved — packaging material by declared material
• Flow property / unit: Mass / kg
• Amount rule: purchased or issued packaging less documented returns and unused stock change
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_materials
• Range: Provisional packaging-mass QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Frozen pork reference output (frozen_pork_reference_output)

This is the only inventory row that uses the verified Tiangong reference-product flow UUID. Record net frozen pork mass at the freezing-operation exit on the declared mass basis.

• Selected flow: Meat of pigs, frozen e7b009bd-ea26-4617-9ccf-f14d12e2c0b6
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: fixed reference amount of 1,000 kg net frozen pork
• Value mode: Fixed value (fixed_value)
• Specificity: Not applicable (not_applicable)
• Normalization basis: 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Identity reference (identity_reference)

Waste flows

Packaging scrap (packaging_scrap)

Record packaging material that does not become product packaging, separated by material and treatment route.

• Selected flow: Unresolved — packaging waste by declared material
• Flow property / unit: Mass / kg
• Amount rule: measured discarded packaging plus stock reconciliation losses
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_materials
• Range: Provisional packaging-scrap QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Refrigerant released to air (refrigerant_release_air)

Calculate releases separately for each refrigerant from the documented charge and service balance; do not report all make-up as an emission when recovery or inventory change is documented.

• Selected flow: Unresolved — elementary emission to air for declared refrigerant
• Flow property / unit: Mass / kg
• Amount rule: refrigerant mass-balance release calculated under calc_refrigerant_release
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance
• Range: Provisional refrigerant-release QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 20
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Frozen storage and dispatch (frozen_storage_dispatch)

Inputs

Product flows

Frozen pork entering storage (frozen_pork_storage_input)

Record the net mass transferred from freezing into frozen storage, including documented transfer losses but excluding packaging mass from the net product basis.

• Selected flow: Unresolved — internal frozen pork intermediate; do not duplicate the reference-product UUID as a purchased input
• Flow property / unit: Mass / kg
• Amount rule: measured net frozen pork transferred into storage
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_storage_dispatch
• Range: Provisional storage-input mass QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1000
  • Upper: 1200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Frozen-storage electricity (storage_electricity)

Record electricity attributable to the declared storage duration and dispatch handling. Use dedicated metering or a documented load, volume, and time allocation from reconciled facility meters.

• Selected flow: Unresolved — market electricity supplied to facility
• Flow property / unit: Energy / kWh
• Amount rule: measured or calculated storage and dispatch electricity for the declared lot and duration
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output and declared storage duration
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_storage_dispatch
• Range: Provisional frozen-storage electricity QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 5000
  • Unit: kWh
  • Basis: per 1,000 kg net frozen pork reference output for the declared storage duration
  • Basis kind: Storage duration (storage_duration)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Elementary flows

Outputs

Product flows

Frozen pork dispatched at facility gate (frozen_pork_dispatched)

Record the dispatched net mass and confirm it represents the same lot, product qualifiers, and temperature specification as the reference flow.

• Selected flow: Unresolved — dispatch transfer of the reference frozen pork product
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: measured net dispatch mass normalized to 1,000 kg
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_storage_dispatch

Waste flows

Storage and dispatch product losses (storage_product_loss)

Record damaged, thawed, rejected, or otherwise undispatched meat by fate and keep it distinct from marketed co-products.

• Selected flow: Unresolved — frozen meat loss to declared treatment
• Flow property / unit: Mass / kg
• Amount rule: measured rejected mass or inventory reconciliation difference after investigating unexplained loss
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg net frozen pork reference output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_storage_dispatch
• Range: Provisional storage-loss QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 200
  • Unit: kg
  • Basis: per 1,000 kg net frozen pork reference output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
allocation_subdivision_first	shared_foreground_inputs	Avoid allocation by separately metering and subdividing receipt, preparation, freezing, packaging, storage, and waste-treatment operations wherever technically feasible.	fao-leap-pig-2018
allocation_frozen_pork_group	covered_frozen_pork_presentations	Do not allocate among carcass, half-carcass, bone-in, or boneless frozen pork presentations that remain inside the declared covered-product group; aggregate their net mass unless the goal requires separately measured product packages.	fao-leap-pig-2018
allocation_coproduct_hierarchy	marketed_non_reference_outputs	When subdivision is not feasible, apply a documented physical or biophysical relationship only for outputs with similar functions and markets; otherwise allocate shared burdens by contemporaneous net economic value and test sensitivity to the allocation choice.	fao-leap-pig-2018
allocation_waste_treatment	waste_and_residual_outputs	Do not treat a disposal-bound output as a co-product. Retain attributable collection and treatment burdens in the foreground package; if an output has a documented market and subsequent use, reclassify it consistently and apply the co-product hierarchy.	fao-leap-pig-2018

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_received_meat	meat_receipt_preparation	incoming unfrozen pig meat	weighbridge, platform-scale, receiving, and supplier records	lot_id; supplier; upstream_dataset_id; gross_mass; tare_mass; net_mass; temperature; carcass_or_cut_form; bone_status; acceptance_status	Calibrated scale reading reconciled to receiving documents	kg and °C	Each received lot	Complete representative production period, normally at least 12 consecutive months or all campaigns if seasonal	All facilities and suppliers represented by the dataset	Sum accepted net mass by compatible product qualifier; normalize with calc_reference_normalization	Scale calibration, tare method, receiving document, lot traceability, and upstream dataset match
cp_water_wastewater	meat_receipt_preparation	preparation water and wastewater	meters, invoices, submeter estimates, and discharge records	meter_start; meter_end; water_source; attributable_share; discharge_volume; retained_water; cleaning_event; treatment_route	Dedicated meter preferred; otherwise reconcile facility water balance and documented allocation driver	m3	Meter interval and each material cleaning campaign	Same period as production output	All preparation and sanitation operations in scope	Sum attributable withdrawal and discharge; separate sources and treatment routes; normalize with calc_reference_normalization	Meter calibration, invoices, allocation basis, water-balance reconciliation, and treatment records
cp_preparation_outputs	meat_receipt_preparation	prepared meat, co-products, and solid waste	transfer scales, yield sheets, sales records, and waste manifests	lot_id; prepared_meat_mass; coproduct_type; coproduct_mass; coproduct_destination; waste_type; waste_mass; treatment_route	Calibrated mass records at each outgoing route	kg	Each lot or shift	Same period as received meat	All preparation lines in scope	Sum by output role and destination; reconcile with received mass under calc_meat_mass_balance	Scale calibration, signed transfer or sales record, waste manifest, and investigated reconciliation variance
cp_freezing_energy_temperature	freezing_packaging	freezing electricity and time-temperature profile	electricity meters, equipment logs, and temperature records	meter_start; meter_end; equipment_id; rated_power; runtime; lot_id; product_start_temperature; product_end_temperature; setpoint; freezing_start; freezing_end	Dedicated meter plus product-temperature logger preferred; calculated equipment load only when meter separation is unavailable	kWh, °C, and h	Meter interval and each lot	Same period as frozen output	All freezing equipment and auxiliary loads in scope	Sum dedicated electricity; otherwise allocate reconciled electricity by documented equipment runtime and load; normalize with calc_reference_normalization	Meter calibration, logger calibration, equipment record, facility-bill reconciliation, and allocation calculation
cp_refrigerant_balance	freezing_packaging	refrigerant make-up and release	refrigerant inventory and service records	refrigerant_id; system_id; opening_charge; additions; closing_charge; recovered_mass; returned_mass; service_date; operation_share	Refrigerant inventory and service-record mass balance by chemical or blend	kg	Each service event and reporting-period opening and close	Same period as freezing and storage output	All refrigeration circuits serving in-scope operations	Calculate release separately by refrigerant with calc_refrigerant_release; allocate shared systems using documented operation share	Service invoices, cylinder weights, technician records, charge inventory, and reconciliation review
cp_packaging_materials	freezing_packaging	product packaging and packaging scrap	purchase, stock, issue, reuse, and waste records	material_id; opening_stock; receipts; closing_stock; returned_reuse; packaged_product_assignment; scrap_mass; treatment_route	Stock reconciliation supported by purchase, issue, and waste records	kg	Each stock period and material change	Same period as frozen output	All primary, secondary, and tertiary packaging in scope	Calculate consumed packaging by material; separate reusable returns and scrap; normalize with calc_reference_normalization	Supplier invoices, stock counts, material specification, reuse log, and waste manifest
cp_storage_dispatch	frozen_storage_dispatch	stored and dispatched pork, storage electricity, temperature, duration, and losses	warehouse, dispatch, meter, and temperature records	lot_id; storage_entry_mass; dispatch_mass; entry_time; dispatch_time; storage_zone; setpoint; temperature_log; meter_start; meter_end; load_share; rejected_mass; loss_fate	Calibrated dispatch scales, continuous or representative temperature logger, and dedicated meter or reconciled load allocation	kg, kWh, °C, h, and d	Each lot; electricity meter interval; temperature at validated frequency	Same period as frozen output, including the full declared storage duration	All frozen rooms and dispatch handling in scope	Calculate storage duration per lot; allocate storage electricity by documented mass-time, pallet-space-time, or validated load share; reconcile output and losses; normalize with calc_reference_normalization	Scale, meter, and logger calibration; warehouse ledger; dispatch record; allocation calculation; loss investigation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	All inventory values	normalized_value = attributable_period_value / net_frozen_pork_dispatched × 1,000 kg	Attributable period value; net frozen pork dispatched on the declared mass basis	Inventory value per 1,000 kg net frozen pork
calc_meat_mass_balance	meat_receipt_preparation and frozen_storage_dispatch	Reconcile received or transferred meat mass with reference product, separately marketed co-products, wastes, and documented moisture or inventory change; investigate and disclose any residual	Incoming meat; prepared meat; frozen output; co-products; wastes; stock change; documented moisture change	Lot and reporting-period mass-balance reconciliation	fao-leap-pig-2018
calc_refrigerant_release	Refrigeration circuits serving freezing and storage	release = opening_charge + additions - closing_charge - recovered_mass - returned_mass, bounded at zero only after investigating inconsistent records	Refrigerant-specific opening and closing charge; additions; recovery; returns; attributable operation share	kg release by refrigerant and normalized reference flow
calc_packaging_consumption	Packaging materials	consumed_packaging = opening_stock + receipts - closing_stock - reusable_returns; report scrap and product-associated packaging separately	Packaging stock, receipts, reusable returns, scrap, and product assignment by material	kg packaging consumed and kg scrap by material

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity_traceability	Product and incoming meat	Maintain lot linkage from incoming unfrozen meat through preparation, freezing, storage, and dispatch, including upstream dataset id and every required product qualifier.	Receiving records, production lot ledger, warehouse ledger, dispatch record, and upstream dataset reference
dq_temporal_coverage	Foreground activity data	Use one coherent representative period, normally at least 12 consecutive months unless seasonality or campaign production justifies another period; disclose deviations and stock changes.	Dated meter, production, stock, service, and dispatch records; period-coverage calculation
dq_representativeness	Facilities, technologies, geography, and suppliers	Document technological, geographical, and temporal representativeness, completeness, and accuracy; disclose proxy data and assess its effect on results.	Data-quality assessment following fao-leap-pig-2018 and retained proxy-data justification
dq_measurement_control	Mass, electricity, water, refrigerant, and temperature	Retain current calibration or verification evidence and investigate missing intervals, negative balances, unexplained meter resets, and inconsistent units.	Calibration certificates, maintenance records, exception log, and reconciliation worksheet
dq_reasoned_estimates	All provisional ranges	Treat every reasoned_estimate range only as a broad QA screen. Do not use its midpoint or bounds as a final foreground value; replace with collected data or reviewed source-backed evidence before publication-critical use.	Review record showing replacement evidence or explicit continued QA-only treatment

9. Validation Rules

rule_id	applies_to	rule	source_ids
validation_reference_identity	reference_flow	Require product flow e7b009bd-ea26-4617-9ccf-f14d12e2c0b6, Mass 93a60a56-a3c8-11da-a746-0800200b9a66, Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66, kg, and all required product qualifiers.
validation_process_coverage	foreground_processes	Require all three process ids and an explicit declaration of actual cutting, trimming, packaging sequence, freezing technology, frozen-storage duration, and any integrated upstream stages.	fao-meat-industry-2004
validation_mass_balance	meat_and_packaging_balances	Require reconciled incoming, intermediate, reference-product, co-product, waste, packaging, and stock-change masses; unexplained residuals are findings and must not be silently assigned to the reference product.	fao-leap-pig-2018
validation_energy_temperature	freezing_and_storage	Require electricity records, freezing time-temperature records, storage duration, temperature monitoring, and a documented allocation method for any shared meter.
validation_refrigerant	refrigeration_system	Require refrigerant identity and a non-negative, record-reconciled mass balance by refrigerant; unresolved elementary-flow UUIDs remain explicit and the reference-product UUID must not be reused.
validation_allocation	multifunctional_outputs	Require subdivision evidence or the selected physical, biophysical, or economic allocation key, product grouping, price period where relevant, and sensitivity analysis for material allocation choices.	fao-leap-pig-2018
validation_estimate_status	provisional_qa_ranges	Flag any final inventory amount populated from a reasoned_estimate QA guardrail as nonconforming unless reviewed evidence explicitly authorizes that use.
validation_data_quality	dataset_completeness	Require temporal, technological, geographical, completeness, and accuracy assessment; disclose cut-offs, proxies, missing records, and validation checks skipped.	fao-leap-pig-2018

10. Published Dataset Profile

Field	Value
dataset_role	Foreground data package for frozen pig meat production at the freezing facility dispatch gate
downstream_use	secondary_dataset; background_dataset after methodology review, source resolution, and quality disclosure
allowed_use	Attributional LCI and lifecycle-model construction for frozen pork matching the declared product qualifiers, technology, geography, period, upstream linkage, and facility gate
excluded_use	Unsupported comparative assertions; fresh or chilled meat; prepared or preserved pork; different species; studies that omit required upstream pig-meat datasets or substitute QA estimates for foreground values
required_metadata	PCR id and version state; product and reference-flow UUIDs; CPC mapping context; cut or carcass form; bone status; net-mass convention; packaging state; freezing technology; dispatch temperature specification; storage duration; facility geography; period; upstream dataset ids; cut-offs; allocation method; unresolved UUIDs
required_quality_disclosure	Record coverage; calibration status; meter and scale allocation; mass-balance residuals; proxy and estimate use; source versions; temporal, technological, and geographical representativeness; completeness; uncertainty and sensitivity results; checks skipped
update_trigger	Material change in incoming meat specification, supplier or upstream dataset, cut mix, freezing or refrigeration technology, packaging, storage duration, allocation, facility geography, regulation, or representative energy and material performance

11. Data Sources

Source id	Type	Reference	Used for
fao-leap-pig-2018	official_guidance	FAO. 2018. Environmental performance of pig supply chains: Guidelines for assessment (Version 1). Livestock Environmental Assessment and Performance Partnership. ISBN 978-92-5-130377-1. https://openknowledge.fao.org/3/i8686en/I8686EN.pdf (retrieved 2026-08-11)	Pig-product functional-unit and boundary linkage; material-flow accounting; allocation hierarchy and sensitivity; primary-data, data-gap, representativeness, completeness, and quality rules
fao-meat-industry-2004	official_guidance	FAO. 2004. Good practices for the meat industry. FAO Animal Production and Health Manual. ISBN 92-5-105146-1. https://www.fao.org/4/y5454e/y5454e00.htm (retrieved 2026-08-11)	Meat-process decomposition, carcass handling, establishment hygiene, traceability, and HACCP-oriented foreground record structure