Flatfish, frozen

1. Scope and Applicability

This PCR covers foreground processing of flatfish received for manufacture as frozen uneviscerated or eviscerated finfish, with or without the head, through receipt, preparation, freezing, optional glazing, packaging, frozen storage, and dispatch at the processing-facility gate. The data package shall declare species or species group, wild-caught or aquaculture origin, upstream dataset, received state, evisceration and head presentation, glaze, packaging, freezing route, production geography and period, and the frozen-storage period represented.

It excludes live, fresh, or chilled flatfish; frozen fish fillets; frozen fish meat whether or not minced; fish livers and roes; brine-frozen fish intended for further processing; formulated, coated, cooked, smoked, dried, salted, canned, or otherwise preserved products; and non-flatfish. Fishing, aquaculture, landing, and any prior processing embodied in the received input require separate upstream datasets.

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.flatfish-frozen
classification_refs	CPC 3.0: 21213, Flatfish, frozen (exact mapping context)
covered_products	Frozen flatfish presented as uneviscerated or eviscerated finfish, head-on or headless, including declared glazing and packaging
excluded_products	Live, fresh, or chilled flatfish; fish fillets; fish meat whether or not minced; fish livers and roes; brine-frozen fish intended for further processing; formulated, coated, cooked, smoked, dried, salted, canned, or otherwise preserved fish; non-flatfish
representative_product	Packaged eviscerated frozen flatfish, with head and glaze status declared, supplied for human consumption
production_route	Receipt and inspection; sorting and optional washing, evisceration, heading, trimming, and grading; freezing; optional glazing; packaging; frozen storage; facility-gate dispatch
market_state	Frozen flatfish at the processing-facility gate with species, presentation, glaze, packaging, and storage condition declared

3. Reference Flow

Field	Value
What	Supply frozen flatfish in the declared uneviscerated or eviscerated, head-on or headless presentation
How much	1 kg net mass of frozen flatfish
How well	Conforming to the declared species, presentation, glaze, packaging, market specification, and applicable food-safety controls
How long or cycle	One production lot through the declared on-site frozen-storage period to facility-gate dispatch
reference_flow_link	frozen_flatfish_reference

Field	Value
Reference amount	1 kg net product mass, excluding transport packaging and excluding external ice glaze from flatfish mass
Reference product flow	Flatfish, frozen d99b0e6e-06c2-4c08-8ae2-15a6dc1f0116
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 or species group; wild-caught or aquaculture origin and upstream dataset; received form and temperature state; uneviscerated or eviscerated; head-on or headless; other trimming or grading; glaze presence and mass; packaging format and included layers; freezing technology; frozen-storage control regime and duration; production geography and period; facility-gate condition

When constructing a foreground data package, all Required qualifiers shall be declared in dataset metadata, process notes, reference-flow comments, the product description, or equivalent fields. Missing qualifiers make the reference-flow definition incomplete.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_net_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Normalize the inventory to 1 kg net flatfish mass. Exclude external glaze and packaging from product mass and report them separately.
presentation_mass_separation	prepared and frozen product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Keep gross received mass, removed viscera/head/trimmings, retained fish mass, glaze, tare, and packaging as separate measured or calculated quantities.
energy_consistency	electricity and fuels	energy property declared for the exact selected flow	kWh, MJ, or declared convertible unit	Preserve original meter and invoice units, document conversion factors, and do not combine delivered electricity with fuel energy without explicit conversion.
storage_time_basis	frozen storage	mass and elapsed time	kg and day	Record frozen-storage energy against throughput and the declared storage duration; disclose the driver used for shared cold-store allocation.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Flatfish received at the processing facility with species, origin, upstream dataset, received mass, presentation, temperature state, and prior processing declared
starting_condition_role	Upstream product input to foreground frozen-flatfish processing
product_classification_scope	Frozen flatfish within CPC 3.0 subclass 21213 and parent class 2121, which excludes fish fillets and fish meat
recursive_input_rule	A same-category frozen-flatfish input shall use a separate upstream dataset and be identified as repacking, reprocessing, or blending input; its production shall not be recursively rebuilt in this foreground system.
upstream_dataset_requirement	Link each received flatfish input to traceable fishing or aquaculture, landing, and prior-processing datasets; disclose proxy use and any upstream gap.
disclosure	Declare species, origin, received state, preparation, freezing and glazing route, packaging scope, storage duration and control regime, co-products and wastes, allocation, utilities, geography, data period, and exclusions.

rule_id	Applies to	Rule	source_ids
sb_facility_gate	foreground_system	Include receipt, preparation, freezing, optional glazing, packaging, on-site frozen storage, internal handling, cleaning, wastewater and residue handling, and attributable refrigeration losses through facility-gate dispatch.	codex-cxc-52-2003; eu-pef-2021-2279
sb_product_form	product_scope	Limit the reference product to uneviscerated or eviscerated finfish, with or without the head; exclude fillets, fish meat, livers and roes, and brine-frozen fish intended for further processing.	unsd-cpc-v3-21213; codex-cxs-36-1981
sb_cold_chain	freezing_and_storage	Include the freezing operation and all on-site frozen holding and transfers required to maintain the declared condition; retain monitored control and corrective-action records.	codex-cxc-52-2003; codex-cxs-36-1981
sb_upstream_traceability	received_flatfish	Represent fishing or aquaculture, landing, and prior processing through upstream datasets rather than undocumented foreground cut-offs.	eu-pef-2021-2279

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
reception_preparation	Receipt and preparation	required	Always	Foreground receipt, inspection, sorting, washing when used, and declared evisceration, heading, trimming, and grading	kg prepared flatfish
freezing_glazing	Freezing and optional glazing	required	Always; glazing rows apply only when glaze is used	Foreground freezing, temperature control, glaze application, and refrigeration	kg net frozen flatfish
packaging_storage	Packaging, frozen storage, and dispatch	required	Always; packaging rows follow the declared packaging scope	Foreground packaging, frozen storage, internal handling, and facility-gate dispatch	kg reference product

Process: Receipt and preparation (reception_preparation)

Inputs

Product flows

Received flatfish (received_flatfish)

Record each input by species or species group, origin, production system, received presentation and temperature state, and upstream dataset.

• Selected flow: Exact Tiangong product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured gross received mass allocated to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net frozen-flatfish reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass
• Range: Provisional received-flatfish mass-balance QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 4
  • Unit: kg received flatfish/kg net reference product
  • Basis: per 1 kg net frozen-flatfish reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Preparation water and ice (preparation_water_ice)

Record water and ice used for washing, handling, and temperature control, excluding optional glazing water.

• Selected flow: Exact Tiangong product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured or reconciled water and ice assigned to the preparation lot
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg prepared flatfish
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_ice
• Range: Provisional preparation water-and-ice QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 20
  • Unit: kg water and ice/kg prepared flatfish
  • Basis: per 1 kg prepared flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Prepared flatfish (prepared_flatfish)

Record flatfish transferred to freezing after the declared preparation steps.

• Selected flow: Exact Tiangong product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured prepared flatfish mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per preparation lot
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass
• Range: Provisional preparation-yield QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.25
  • Upper: 1
  • Unit: kg prepared flatfish/kg received flatfish
  • Basis: mass ratio to received flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Removed viscera, heads, trimmings, and rejects (preparation_residues)

Record each separated material by physical form, destination, and co-product or waste status; keep saleable co-products distinct from waste.

• Selected flow: Exact Tiangong waste or co-product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured separated mass by destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg received flatfish
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue_wastewater
• Range: Provisional preparation-residue QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.75
  • Unit: kg separated material/kg received flatfish
  • Basis: mass ratio to received flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Preparation wastewater (preparation_wastewater)

Record wastewater discharged to treatment or another destination separately from solid residues.

• Selected flow: Exact Tiangong waste flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured discharge or calculated water balance assigned to the preparation lot
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg prepared flatfish
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_residue_wastewater
• Range: Provisional wastewater QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 20
  • Unit: kg wastewater/kg prepared flatfish
  • Basis: per 1 kg prepared flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Freezing and optional glazing (freezing_glazing)

Inputs

Product flows

Prepared flatfish entering freezing (freezing_input)

Record the measured lot transferred into the freezer.

• Selected flow: Exact Tiangong product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured transfer mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per freezing lot
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass

Electricity for freezing (freezing_electricity)

Record freezer, compressor, pump, fan, and attributable auxiliary electricity by sub-meter or documented shared-meter calculation.

• Selected flow: Exact Tiangong electricity product flow pending geography review
• Flow property / unit: Energy / kWh
• Amount rule: measured or calculated electricity use
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net frozen flatfish
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_storage
• Range: Provisional freezing-electricity QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0.05
  • Upper: 5
  • Unit: kWh/kg net frozen flatfish
  • Basis: per 1 kg net frozen flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Glazing water (glazing_water)

Include only when glaze is applied; measure supplied water and retained glaze separately.

• Selected flow: Exact Tiangong water product flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured glazing water supplied and retained glaze mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net frozen flatfish
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_ice
• Range: Provisional glazing-water QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg supplied glazing water/kg net frozen flatfish
  • Basis: per 1 kg net frozen flatfish
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Net frozen flatfish (frozen_flatfish_reference)

Record the frozen product before packaging and keep retained glaze outside net fish mass.

• Selected flow: Flatfish, frozen d99b0e6e-06c2-4c08-8ae2-15a6dc1f0116
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: fixed reference amount of 1 kg net frozen flatfish
• Value mode: Fixed value (fixed_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Identity reference (identity_reference)

Waste flows

Freezing rejects and non-retained glazing water (freezing_rejects)

Record rejected fish and non-retained glazing water separately by destination where records permit.

• Selected flow: Exact Tiangong waste flow pending review
• Flow property / unit: Mass / kg
• Amount rule: measured or reconciled rejected mass and non-retained water
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net frozen flatfish
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_residue_wastewater
• Range: Provisional freezing-loss QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg rejects and non-retained water/kg net frozen flatfish
  • Basis: per 1 kg net frozen flatfish
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Refrigerant loss to air (freezing_refrigerant_loss)

Calculate loss by named refrigerant from service, recharge, recovery, and charge-balance records; do not use an unspecified refrigerant aggregate.

• Selected flow: Exact Tiangong elementary flow pending refrigerant-specific review
• Flow property / unit: Mass / kg
• Amount rule: calculated attributable refrigerant loss by substance
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net frozen flatfish
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant
• Range: Provisional refrigerant-loss QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.1
  • Unit: kg refrigerant/kg net frozen flatfish
  • Basis: per 1 kg net frozen flatfish
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Process: Packaging, frozen storage, and dispatch (packaging_storage)

Inputs

Product flows

Frozen flatfish entering packaging (packaging_input)

Record net frozen product transferred to packaging.

• Selected flow: Flatfish, frozen d99b0e6e-06c2-4c08-8ae2-15a6dc1f0116
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: measured net transfer mass excluding glaze and packaging
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per packaging lot
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass

Packaging materials (packaging_materials)

Record primary, secondary, and tertiary packaging separately by material and include only layers within the declared scope.

• Selected flow: Exact Tiangong packaging product flows pending material review
• Flow property / unit: Mass / kg
• Amount rule: packaging issued minus reconciled unused returns
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net frozen-flatfish reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging
• Range: Provisional packaging-mass QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg packaging/kg net reference product
  • Basis: per 1 kg net frozen-flatfish reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Electricity for frozen storage and handling (storage_electricity)

Record cold-store and internal-handling electricity and allocate shared meters using a disclosed physical driver that includes storage duration.

• Selected flow: Exact Tiangong electricity product flow pending geography review
• Flow property / unit: Energy / kWh
• Amount rule: calculated use from meter records, throughput or occupied capacity, and storage duration
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference product for the declared storage period
• Basis kind: Storage duration (storage_duration)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_storage
• Range: Provisional frozen-storage electricity QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 3
  • Unit: kWh/kg reference product per declared storage cycle
  • Basis: per 1 kg reference product for the declared storage period
  • Basis kind: Storage duration (storage_duration)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Packaged frozen flatfish at dispatch (dispatched_frozen_flatfish)

Record the dispatched product and reconcile it to exactly 1 kg net flatfish without adding glaze or packaging to the reference mass.

• Selected flow: Flatfish, frozen d99b0e6e-06c2-4c08-8ae2-15a6dc1f0116
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: measured dispatched net mass normalized to 1 kg reference product
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_mass

Waste flows

Packaging scrap (packaging_scrap)

Record packaging scrap by material and destination.

• Selected flow: Exact Tiangong waste flows pending material review
• Flow property / unit: Mass / kg
• Amount rule: measured or reconciled packaging scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging
• Range: Provisional packaging-scrap QA range
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg packaging scrap/kg reference product
  • Basis: per 1 kg reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_avoid	multifunctional_foreground_processes	First avoid allocation by collecting separate process data, subdividing operations, or applying a defensible system-expansion approach.	eu-pef-2021-2279
allocation_physical	joint_products_and_co-products	When avoidance is not feasible, use a documented causal physical relationship. Use mass only when it represents that relationship and disclose factors.	eu-pef-2021-2279
allocation_economic	residual_multifunctionality	Use economic allocation only when no defensible causal physical relationship is available; document the representative price period and test material co-product sensitivity.	eu-pef-2021-2279
allocation_status	heads_viscera_trimmings_rejects_and_recovered_material	Declare whether each separated material is a co-product, animal-feed input, recovered material, treatment input, or waste under the applicable jurisdiction, and disclose credits or burden transfers.	eu-pef-2021-2279

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_material_mass	reception_preparation; freezing_glazing; packaging_storage	received, prepared, frozen, glaze, tare, and dispatched masses	calibrated scale, lot, production, or inventory records	timestamp; lot_id; species; origin; presentation; gross_mass; tare_mass; removed_mass; glaze_mass; net_mass	reconcile lot-linked scales while keeping fish, glaze, tare, and packaging distinct	kg	each lot with periodic reconciliation	declared representative production period	every included facility and line	sum materially equivalent lots and normalize to net reference mass	calibration; lot traceability; reconciliation; operator review
cp_water_ice	reception_preparation; freezing_glazing	preparation water, ice, and glazing water	meters, ice logs, purchase records, and glaze tests	meter_start; meter_end; ice_mass; supplied_water; retained_glaze; lot_id	reconcile supplied water and ice to operations using a disclosed physical driver	kg or m3 with conversion record	each shift or lot with periodic reconciliation	same period as product mass	every included preparation and glazing operation	subtract unrelated use and normalize to process output or reference product	meter check; invoice reconciliation; glaze test
cp_energy_storage	freezing_glazing; packaging_storage	freezing, storage, and handling energy	sub-meters, utility meters, invoices, equipment runtime, and storage logs	meter_start; meter_end; equipment_id; runtime; rated_power; throughput; storage_days; occupied_capacity	prefer sub-metering; otherwise use documented physical allocation	kWh, MJ, or declared fuel unit	continuous, shift, or periodic	same period as production and storage	all included equipment and shared utilities	reconcile to invoices and normalize to process output or storage basis	meter calibration; invoice reconciliation; allocation worksheet
cp_residue_wastewater	reception_preparation; freezing_glazing	residues, rejects, wastewater, and destinations	scales, bins, meters, manifests, sales, treatment, or disposal records	material_type; mass; water_volume; destination; regulatory_status; revenue; lot_id	weigh or meter by destination and reconcile with material and water balances	kg or m3 with conversion record	each removal or discharge with periodic reconciliation	same period as production	all included residue and discharge points	aggregate by material and destination without mixing co-products and waste	scale/meter check; manifest; sales or treatment record
cp_packaging	packaging_storage	packaging used and scrap	bill of materials, issue/return, supplier, and scrap records	material; layer; units_issued; units_returned; unit_mass; scrap_mass; destination	calculate used packaging from reconciled units and verified unit mass	kg	each format with periodic reconciliation	same period as dispatch	all packaging lines and included layers	aggregate by material and normalize to net product mass	supplier specification; unit-mass check; inventory reconciliation
cp_refrigerant	freezing_glazing; packaging_storage	refrigerant loss by substance	service, purchase, recharge, recovery, charge, and repair records	refrigerant_name; added_mass; recovered_mass; opening_charge; closing_charge; service_date; equipment_id; operating_driver	calculate substance-specific balance and attribute shared systems with a disclosed physical driver	kg	each service event with period reconciliation	period overlapping the production dataset	all refrigeration systems serving included operations	aggregate attributable loss by named substance	technician record; purchase record; charge balance; repair closure
cp_cold_chain_quality	freezing_glazing; packaging_storage	freezing and frozen-storage control	validated sensors, lot records, alarms, corrective actions, and package checks	lot_id; timestamp; process_stage; product_temperature_or_validated_proxy; set_point; alarm; action; package_integrity	retain continuous monitoring where available and lot-linked checks under the food-safety plan	declared temperature unit and time	continuous or each lot as applicable	entire included freezing and storage cycle	all included freezers, cold rooms, and transfers	report excursions and affected mass separately	sensor calibration; HACCP record; alarm history; action closure; inspection

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_net_reference_mass	reference product	net flatfish mass = gross frozen product mass - external glaze mass; exclude packaging independently	gross frozen mass; glaze mass; packaging mass	kg net frozen flatfish	codex-cxs-36-1981; codex-cxs-190-1995
calc_normalized_inventory	all inventory rows	normalized amount = included-period amount / dispatched net flatfish mass	reconciled flow amount; dispatched net mass	amount per kg reference product	eu-pef-2021-2279
calc_process_yield	preparation and freezing	yield = measured net output mass / measured input mass for the same lot or reconciled period	input mass; output mass; lot or period link	kg/kg process yield
calc_mass_balance	each process and foreground system	reconcile flatfish, removed material, product, glaze, wastewater-associated material, waste, and inventory change; investigate unexplained residuals	input, output, waste, water, glaze, and inventory-change records	balance residual and explanation
calc_shared_energy	shared utilities	allocate shared energy using a documented physical driver such as runtime, throughput, refrigeration load, occupied capacity, and storage duration	shared meter; driver quantities; included output	energy per process output or reference product	eu-pef-2021-2279
calc_refrigerant_loss	refrigeration systems	attributable loss = added refrigerant - recovered refrigerant - documented charge increase, by named substance and disclosed allocation driver	service and charge records; operating driver	kg refrigerant attributable to included operations

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	product and material records	Preserve species or species group, origin, upstream dataset, uneviscerated/eviscerated and head-on/headless presentation, glaze, and packaging at the level needed to avoid mixing materially different products.	lot traceability, supplier and product specifications, upstream datasets; unsd-cpc-v3-21213; codex-cxs-36-1981
dq_temporal_representativeness	foreground activity data	Use a declared period representative of production and storage conditions; disclose seasonality, shutdowns, abnormal lots, missing periods, and extrapolation.	dated production, meter, storage, and utility records; eu-pef-2021-2279
dq_technology_geography	processes and utilities	Identify preparation, freezing, glazing, packaging, refrigeration, and wastewater technologies and use geography-appropriate utility and upstream datasets.	equipment register, site records, supplier data, dataset metadata; eu-pef-2021-2279
dq_completeness	foreground system	Reconcile major materials, water/ice, energy, packaging, refrigerant, residues, wastewater, co-products, and product; list every exclusion and justification.	material/energy reconciliation and exclusion log; eu-pef-2021-2279
dq_food_safety_quality	receipt through dispatch	Retain applicable hygiene, hazard-control, freezing, frozen-storage, glaze-water, package-integrity, excursion, and corrective-action evidence.	food-safety plan, monitoring, calibration, alarms, inspection, and action records; codex-cxc-52-2003; codex-cxs-36-1981
dq_estimate_replacement	provisional ranges	Treat every reasoned_estimate range as a screening flag only and replace or explicitly review it before publication-critical use.	review record and representative foreground or source-backed replacement evidence

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_identity	reference_flow	Require product-flow UUID d99b0e6e-06c2-4c08-8ae2-15a6dc1f0116, Mass UUID 93a60a56-a3c8-11da-a746-0800200b9a66, unit-group UUID 93a60a57-a4c8-11da-a746-0800200c9a66, unit kg, and exactly 1 kg net reference mass.
validate_scope_qualifiers	dataset_identity	Treat the dataset as incomplete when species/origin, upstream dataset, product presentation, glaze, packaging, freezing route, storage regime/duration, geography, or data period is missing.	unsd-cpc-v3-21213; codex-cxs-36-1981
validate_process_coverage	process_inventory	Require every required process and the complete on-site frozen chain, or a documented zero/not-applicable statement supported by facility evidence.	codex-cxc-52-2003; codex-cxs-36-1981
validate_mass_reconciliation	mass_balance	Require lot- or period-consistent reconciliation of received flatfish, prepared and net product, glaze, co-products, residues, rejects, wastewater-associated material, and inventory change; flag unexplained residuals.
validate_allocation	multifunctionality	Require evidence of allocation avoidance or the selected physical/economic method, factors, material status, price period when relevant, and sensitivity disclosure.	eu-pef-2021-2279
validate_cold_chain_quality	food_safety_and_quality	Require linked freezing, storage, package-integrity, excursion, and corrective-action records under applicable requirements; do not infer conformity from an average temperature alone.	codex-cxc-52-2003; codex-cxs-36-1981
validate_data_quality	foreground_dataset	Require temporal, technological, geographical, completeness, traceability, calibration, missing-data, uncertainty, and provisional-estimate disclosures.	eu-pef-2021-2279

10. Published Dataset Profile

Field	Value
dataset_role	Foreground production dataset for frozen-flatfish processing at the processing-facility gate
downstream_use	secondary_dataset; background_dataset
allowed_use	LCA of declared frozen flatfish when species/origin, upstream production, presentation, facility technology, glaze, packaging, storage duration, geography, data period, and allocation are representative
excluded_use	Direct representation of fishing or aquaculture, live/fresh/chilled flatfish, fillets, fish meat, livers or roes, brine-frozen inputs for further processing, other preservation routes, downstream distribution, retail, cooking, consumption, or end-of-life without added datasets
required_metadata	PCR id and version context; product-flow UUID; species/origin; upstream datasets; received and dispatched presentation; glaze; packaging scope; included operations; freezing and refrigeration technology; storage regime and duration; geography; data period; allocation; co-product/waste status; exclusions/proxies; data owner and review status
required_quality_disclosure	Source-to-row traceability; measurement and calculation methods; calibration and reconciliation; temporal, technological, and geographical representativeness; mass balance; food-safety evidence; allocation sensitivity; missing data; provisional estimates; uncertainty and limitations
update_trigger	Material change in flatfish species or source, received presentation, product specification, preparation/freezing/glazing technology, refrigerant, energy supply, packaging, storage duration, allocation or co-product route, regulation, facility configuration, or representative data period

11. Data Sources

Source id	Type	Reference	Used for
unsd-cpc-v3-21213	official_guidance	United Nations Statistics Division, Central Product Classification (CPC) Version 3.0, subclass 21213, Flatfish, frozen, https://unstats.un.org/unsd/classifications/Econ/cpc (retrieved 2026-08-11)	Product-category identity and exclusion of fish fillets and fish meat through the CPC hierarchy
codex-cxc-52-2003	official_guidance	Codex Alimentarius, Code of Practice for Fish and Fishery Products, CXC 52-2003, https://www.fao.org/4/i2382e/i2382e.pdf (retrieved 2026-08-11)	Process decomposition, hygienic handling, freezing and storage controls, hazard-control records, and quality evidence
codex-cxs-36-1981	standard	Codex Alimentarius, Standard for Quick-Frozen Finfish, Uneviscerated and Eviscerated, CXS 36-1981, https://workspace.fao.org/sites/codex/Standards/CXS%2036-1981/CXS_036e.pdf (retrieved 2026-08-11)	Product-form boundary, freezing and deep-frozen condition, glazing-water quality, net contents excluding glaze, labelling, and storage controls
codex-cxs-190-1995	standard	Codex Alimentarius, Standard for Quick-Frozen Fish Fillets, CXS 190-1995, https://workspace.fao.org/sites/codex/Standards/CXS%20190-1995/CXS_190e.pdf (retrieved 2026-08-11)	Cross-category corroboration for quick-freezing, glaze exclusion from net contents, and frozen-chain quality only; not authority for this PCR product scope
eu-pef-2021-2279	official_guidance	European Commission Recommendation (EU) 2021/2279 on the use of the Environmental Footprint methods, CELEX 32021H2279, https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32021H2279 (retrieved 2026-08-11)	Boundary completeness, normalization, multifunctionality and allocation hierarchy, representativeness, data quality, and disclosure