Weighing machinery (excluding balances of a sensitivity of 5 cg or better)

1. Scope and Applicability

This PCR governs cradle-to-factory-gate foreground data packages for complete manual, non-automatic, and automatic machinery whose principal function is to determine mass by weighing. It covers shop, platform, bench, floor, vehicle, conveyor, catchweighing, checkweighing, price-labelling, filling, totalising, and comparable weighing machines when supplied as complete equipment.

Balances with a sensitivity of 5 cg or better, standalone weights and parts, laboratory precision-balance subassemblies, installation at the customer site, distribution, use-phase electricity, calibration after placement in service, maintenance, and end-of-life are excluded. A study that includes an excluded life-cycle stage shall model it as a separately declared process rather than silently adding it to this factory-gate rule.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.general-purpose-machinery.weighing-machinery-excluding-balances-of-a-sensitivity-of-5-cg-or-better
classification_refs	CPC 3.0: 43922, exact classification context
covered_products	Complete weighing machines below the excluded precision-balance boundary, including non-automatic and automatic instruments
excluded_products	Balances with a sensitivity of 5 cg or better; standalone weighing-machine weights; parts and subassemblies sold separately; non-weighing measuring instruments
representative_product	A complete factory-tested weighing machine with load receptor, load-transmission and indicating elements; electronic control is included when fitted
production_route	Purchased material and component receipt; in-house metal fabrication when performed; conditional alkaline parts cleaning; final assembly; calibration and functional testing; factory packaging
market_state	Complete, calibrated or factory-tested equipment, packaged and ready for dispatch at the manufacturer's factory gate

3. Reference Flow

Field	Value
What	Complete weighing machinery that determines the mass of a load under declared operating conditions
How much	1 kg net mass of complete weighing machinery
How well	Declared automatic or non-automatic mode, rated minimum and maximum capacity, scale or verification interval, accuracy class where applicable, load-receptor configuration, electrical supply, and intended product or application
How long or cycle	Production through the packaged factory-gate state; service life and number of weighing cycles are declared metadata but are outside the inventory boundary
reference_flow_link	The output row weighing_machine_output, normalized to 1 kg net product mass

Field	Value
Reference amount	1 kg
Reference product flow	Weighing machinery (excluding balances of a sensitivity of 5 cg or better); Tiangong UUID unresolved
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	instrument automation mode; rated minimum and maximum capacity; scale interval or verification scale interval; accuracy class when applicable; load-receptor type; mechanical, electromechanical, or electronic architecture; electrical supply; intended weighed product or application; net product mass; included accessories; factory geography; production year

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_product_mass	reference product and normalization denominator	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Determine net mass of the complete machine after factory testing and before external transport packaging. Exclude pallets and shipping boxes from the reference-product mass and record them as separate inputs.
electricity_energy	purchased electricity rows	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve meter readings and conversion records. Convert kWh to MJ using 1 kWh = 3.6 MJ and do not mix site generation with purchased electricity without separate disclosure.
gas_volume_conditions	natural gas and industrial oxygen	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Report metered volume at the supplier or meter reference temperature and pressure and disclose those conditions; do not combine gases into one utility row.
mass_input_output_consistency	materials, components, packaging, scrap, and waste alkaline liquor	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use as-received mass for purchased inputs and measured dispatched mass for outputs. Reconcile inventory and stock changes over the same reporting period before normalization.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased metals, components, process chemicals, packaging, fuels, gases, electricity, and water at the manufacturing-site gate
starting_condition_role	Cradle-to-gate inputs with upstream production and delivery represented by linked datasets
product_classification_scope	Complete weighing machinery within the semantic boundary stated in Sections 1 and 2, independent of any one sales model or rated capacity
recursive_input_rule	A purchased complete weighing machine incorporated into another machine is recorded once as a product input with a separate upstream dataset and is not recursively expanded under this PCR
upstream_dataset_requirement	Each purchased product or energy input requires a geographically and technologically representative upstream dataset; supplier-specific datasets are preferred when verified
disclosure	Declare make-or-buy boundary, included fabrication and cleaning steps, allocation of shared facilities, outsourced processes, packaging configuration, factory geography, reporting period, and any excluded material or emission

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	all foreground processes	Include receipts and stock changes for inputs, in-house fabrication, conditional parts cleaning, assembly, calibration and functional testing, and packaging through the packaged factory-gate output.	un-cpc-3-0-structure-2025
boundary_outsourced_operations	outsourced fabrication, finishing, or component assembly	Represent an outsourced operation through the purchased component or treatment-service dataset and prevent double counting of the same material, energy, waste, or emission in the foreground site.
boundary_instrument_architecture	automatic and non-automatic instruments	Declare the instrument architecture and operating-condition qualifiers so product variants are compared only when their measurement function and rated conditions are compatible.	oiml-r76-1-2006; oiml-r51-1-2006; eu-directive-2014-32

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
component_fabrication	Metal component fabrication	conditional	Include when load receptors, frames, enclosures, levers, brackets, or other structural metal components are fabricated at the reporting site; otherwise disclose the make-or-buy boundary and record each purchased finished component in the completed data package	foreground production	kg conforming fabricated components transferred to assembly
alkaline_parts_cleaning	Aqueous alkaline parts cleaning	conditional	Include only when an aqueous sodium-hydroxide cleaning bath is operated within the foreground boundary	foreground conditioning	kg cleaned metal parts transferred to assembly
assembly_calibration_packaging	Final assembly, calibration, functional testing, and packaging	required	Always include for a complete factory-gate product	foreground production and release	kg conforming packaged weighing machinery released at the factory gate

Process: Metal component fabrication (component_fabrication)

Inputs

Product flows

Carbon steel sheet supplied for fabricated structures (steel_sheet_input)

Record carbon steel sheet crossing the site boundary for in-house manufacture. Keep grade, coating state, thickness, recycled-content claim, supplier, and geography in the foreground record.

• Selected flow: Carbon steel sheet; Tiangong UUID unresolved
• Flow property / unit: Mass / kg
• Amount rule: Measured receipts plus opening stock minus closing stock and documented returns for the reporting period
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_mass_balance

Purchased electricity for fabrication (electricity_fabrication)

Record electrical energy consumed by cutting, forming, machining, welding, ventilation, and directly attributable fabrication auxiliaries.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered fabrication electricity allocated to conforming component output
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_and_gas_meters

Natural gas for on-site thermal fabrication (natural_gas_fabrication)

Record gaseous natural gas only when it is combusted within the foreground boundary for fabrication heat; otherwise mark this row not applicable.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: Metered natural-gas volume attributable to fabrication, with meter reference conditions declared
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_and_gas_meters

Industrial oxygen for oxygen-fuel cutting (industrial_oxygen_fabrication)

Record industrial oxygen only for oxygen-fuel cutting performed within the foreground boundary.

• Selected flow: Industrial oxygen bd4b0f96-2090-4806-a648-335ab20ff401
• Flow property / unit: Volume / m3
• Amount rule: Supplier delivery or meter volume assigned to oxygen-fuel cutting, with purity and reference conditions declared
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_and_gas_meters

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Scrap steel separated from fabrication (scrap_steel_output)

Record ferrous offcuts and rejected fabricated steel components leaving fabrication for recovery or treatment. Keep grade, contamination, destination, and whether the recipient pays for the scrap.

• Selected flow: Scrap steel c3fc5605-baa3-4b25-9934-ecf7fcbc72da
• Flow property / unit: Mass / kg
• Amount rule: Measured dispatch mass plus closing scrap accumulation minus opening scrap accumulation
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_mass_balance

Elementary flows

Fossil carbon dioxide from on-site natural-gas combustion (carbon_dioxide_fossil_output)

Record only direct fossil carbon dioxide released by natural gas combusted in the foreground process. Do not add upstream electricity or fuel-supply emissions here.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Calculate from metered natural-gas use and an applicable reviewed fuel carbon or emission factor; retain factor source, oxidation assumption, and calculation record
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_direct_combustion_emissions

Process: Aqueous alkaline parts cleaning (alkaline_parts_cleaning)

Inputs

Product flows

Process water supplied to the alkaline cleaning bath (process_water_cleaning)

Record water charged to and added to the cleaning bath when this process is operated on site. Declare water source, quality, and any density conversion.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Metered or batch-recorded water charged to and added to the cleaning system
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_alkaline_cleaning_batches

Sodium hydroxide supplied to the cleaning bath (sodium_hydroxide_cleaning)

Record sodium hydroxide crossing the foreground boundary for bath preparation or replenishment. Declare product concentration and supply state.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: As-supplied solution or solid mass charged, retaining concentration when dry-active-mass calculations are used
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_alkaline_cleaning_batches

Purchased electricity for alkaline cleaning (electricity_cleaning)

Record electricity used by bath heating, pumps, extraction, and directly attributable cleaning equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Submetered energy or documented equipment power multiplied by logged operating time
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_alkaline_cleaning_batches

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Spent alkaline cleaning bath sent to treatment (waste_alkaline_liquor_output)

Record spent bath liquor removed from the cleaning system for treatment. Declare composition, metal loading, hazard classification, destination, and retained water.

• Selected flow: Waste Alkaline Liquor ce738ef0-a711-4650-a38b-34479efd7559
• Flow property / unit: Mass / kg
• Amount rule: Measured dispatched mass plus closing stored mass minus opening stored mass for the reporting period
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_alkaline_cleaning_batches

Elementary flows

Process: Final assembly, calibration, functional testing, and packaging (assembly_calibration_packaging)

Inputs

Product flows

Populated electronic control assembly (electronic_control_assembly_input)

Record the populated controller assembly only for electronic weighing machines. Mechanical machines without one mark this row not applicable; do not substitute an unpopulated printed wire board.

• Selected flow: Populated electronic control assembly for weighing machinery; Tiangong UUID unresolved
• Flow property / unit: Mass / kg
• Amount rule: Measured or supplier-declared mass of conforming assemblies consumed, adjusted for inventory change and returns
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_assembly_and_packaging_records

Purchased electricity for assembly, calibration, and testing (electricity_assembly)

Record electricity consumed by assembly tools, instrument energisation, calibration benches, functional testing, and directly attributable packaging equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Submetered energy or documented equipment power multiplied by logged operating time and allocated to conforming output
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_assembly_and_packaging_records

Corrugated-board boxes for factory packaging (corrugated_board_boxes_input)

Record corrugated-board boxes supplied for the dispatched product. Other packaging components require their own atomic rows in the completed foreground data package.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Measured or supplier-declared box mass consumed for conforming dispatched machines, adjusted for packaging inventory change
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_assembly_and_packaging_records

Waste flows

Elementary flows

Outputs

Product flows

Complete factory-gate weighing machine (weighing_machine_output)

Record only conforming complete weighing machinery that has passed the declared factory calibration or functional test and is released for dispatch. The product UUID remains unresolved; mass property and unit group are confirmed.

• Selected flow: Weighing machinery (excluding balances of a sensitivity of 5 cg or better); Tiangong UUID unresolved
• Flow property / unit: Mass / kg
• Amount rule: 1 kg net complete-machine mass as the reference output; retain actual total conforming output mass used as the normalization denominator
• Value mode: Fixed value (fixed_value)
• Specificity: Generic (generic)
• Normalization basis: 1 kg complete weighing machinery output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_assembly_and_packaging_records

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_avoid	shared foreground operations	Prefer subdivision, dedicated meters, batch records, and direct assignment of material, energy, waste, and emissions before applying allocation.
allocation_physical	unavoidable shared fabrication, cleaning, assembly, calibration, or packaging burdens	Use the physical driver causing the burden: machine time for equipment electricity, metered volume for gases, bath throughput for cleaning, and measured mass for material handling. Document the driver and test the effect of material alternatives.
allocation_scrap	scrap steel and waste alkaline liquor	Report each waste output where it leaves the foreground process. Do not subtract an avoided primary-material credit inside the foreground inventory; model downstream recovery consistently with the study goal.
allocation_no_sales_default	complete weighing machinery variants	Do not use revenue as the default allocator across models with different capacity, architecture, or accuracy. If physical allocation is infeasible, disclose the economic period and provide sensitivity results.

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_balance	component_fabrication	steel input and scrap output	purchase, stock, production, and waste-dispatch records	material identity; grade; opening stock; receipts; returns; closing stock; conforming transfer mass; scrap opening stock; scrap dispatch; scrap closing stock	reconcile signed inventory records to calibrated scales and fabrication batches	kg	each receipt and dispatch; monthly reconciliation	at least 12 consecutive representative months or the full production campaign	all site operations producing covered metal components	calculate net consumption and scrap generation for the same period; allocate only after reconciliation	scale calibration; purchase and dispatch documents; stock count; batch genealogy
cp_energy_and_gas_meters	component_fabrication	fabrication electricity, natural gas, and industrial oxygen	utility meter, submeter, cylinder, bulk delivery, and operating records	opening and closing readings; deliveries; meter factor; reference conditions; purity; equipment; operating time; downtime; allocated output	use calibrated submeters where available; otherwise reconcile site totals and documented equipment drivers	MJ for electricity; m3 for gases	continuous or per batch; monthly reconciliation	at least 12 consecutive representative months or the full production campaign	fabrication equipment and directly attributable auxiliaries	subtract unrelated and idle loads, apply documented physical allocation, then normalize	meter calibration; invoices; delivery tickets; operating logs; allocation worksheet
cp_direct_combustion_emissions	component_fabrication	fossil carbon dioxide	fuel meter and reviewed factor calculation record	fuel volume; reference conditions; gas composition or factor; factor unit; oxidation assumption; factor source; calculated emission	calculate from reconciled foreground fuel use using an applicable reviewed factor	kg	each reporting period	same period as fuel inventory	foreground combustion equipment only	sum source-specific emissions and divide by conforming output mass	fuel reconciliation; factor source; calculation review
cp_alkaline_cleaning_batches	alkaline_parts_cleaning	water, sodium hydroxide, electricity, and waste alkaline liquor	bath make-up, replenishment, meter, maintenance, and waste-transfer records	batch id; water charge; sodium hydroxide mass and concentration; electricity; parts throughput; bath life; removed liquor mass; composition; destination	reconcile batch sheets, chemical issues, submeters, stored waste, and transfer documents	kg for materials and waste; MJ for electricity	each bath make-up, replenishment, and discharge	all batches in the representative period	cleaning equipment treating covered components	aggregate covered batches; allocate by cleaned-parts mass only when direct assignment is unavailable	batch sheets; meter checks; chemical certificates; waste manifest; mass-balance review
cp_assembly_and_packaging_records	assembly_calibration_packaging	electronic control assembly, electricity, corrugated boxes, and conforming output	bill of materials, stock, submeter, test, packaging, and release records	model; serial or batch id; controller mass and quantity; box mass and quantity; electricity; test duration; rejects; rework; net output mass	reconcile issued components and packaging with release records and submetered or engineering energy records	kg and MJ	per batch or production order; monthly reconciliation	at least 12 consecutive representative months or the full production campaign	covered final assembly, factory calibration, testing, and packaging	include rework burden; exclude nonconforming output from denominator; normalize by released net product mass	approved bill of materials; supplier declarations; meter records; calibration and test result; release record

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_period_normalization	every collected inventory row except the fixed reference output	normalized amount = reconciled quantity attributable to covered conforming products / net mass of covered conforming products released in the same period	reconciled row quantity; allocated share when needed; released net product mass	row amount per 1 kg reference flow
calc_electricity_conversion	electricity rows recorded in kWh	electricity in MJ = measured electricity in kWh × 3.6	electricity meter reading in kWh	electricity in MJ
calc_stock_balance	purchased materials, components, chemicals, and packaging	consumption = opening stock + receipts - returns - closing stock, adjusted for documented transfers and count corrections	signed stock and receipt fields	consumed mass in kg
calc_direct_fossil_co2	carbon_dioxide_fossil_output	fossil CO2 = reconciled natural-gas quantity × applicable reviewed carbon or emission factor × declared oxidation adjustment where the factor does not already include oxidation	natural-gas record; factor; factor units; oxidation treatment	kg fossil CO2 per reporting period and per reference flow

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Preserve model or family, architecture, automatic or non-automatic mode, rated capacity range, interval or verification interval, accuracy class where applicable, intended application, net mass, and accessories.	product specification; bill of materials; type or conformity documentation; release record
dq_temporal_representativeness	all foreground rows	Use one common representative period of at least 12 consecutive months unless the full campaign is shorter; explain shutdowns, abnormal batches, missing data, and substitutions.	dated meter, stock, production, and waste records
dq_mass_completeness	material, component, packaging, product, and waste rows	Reconcile opening stock, receipts, returns, transfers, conforming output, nonconforming output, waste, and closing stock; investigate imbalances before release.	signed mass-balance worksheet and source documents
dq_route_completeness	conditional processes and rows	Mark each conditional process or row applicable or not applicable and retain evidence; do not silently omit outsourced finishing, additional packaging, another fuel, another chemical, another waste stream, or a direct emission.	route declaration; process map; supplier and site records
dq_meter_quality	electricity and gas rows	Record meter identity, reading dates, calibration or verification status, reference conditions for volume, estimation method, and uncertainty or limitation.	meter certificate; invoice; reading log; estimation review

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity_and_exclusion	reference product	Confirm that the output is a complete weighing machine within CPC 43922 and is not a balance with sensitivity of 5 cg or better, a standalone weight, or a separately sold part.	un-cpc-3-0-structure-2025
validate_metrological_qualifiers	reference product metadata	Require automation mode, minimum and maximum capacity, scale or verification interval, accuracy class when applicable, load-receptor type, electrical supply, and intended product or application; flag comparisons with incompatible functions or operating conditions.	oiml-r76-1-2006; oiml-r51-1-2006; eu-directive-2014-32
validate_reference_mass	normalization	Confirm that the denominator is released net machine mass and transport packaging is recorded separately; require output amount exactly 1 kg after normalization.
validate_inventory_accounting	foreground inventory	Verify same-period stock reconciliation, mass balance, utility reconciliation, included rework, excluded nonconforming output from the denominator, and an explicit applicability decision for every conditional row.
validate_no_double_counting	outsourced and in-house operations	Confirm that purchased components or treatment services and foreground operations do not represent the same material, energy, waste, or emission twice.
validate_direct_emissions	carbon_dioxide_fossil_output	Require a direct-combustion source, reconciled fuel quantity, reviewed factor identity and units, and oxidation treatment; reject upstream emissions entered as direct elementary flows.

10. Published Dataset Profile

Field	Value
dataset_role	foreground product manufacturing dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Cradle-to-gate modelling of a declared weighing-machine model or coherent family with compatible function, architecture, capacity, accuracy, factory geography, technology, and production period
excluded_use	Precision balances at or beyond the excluded sensitivity; separately sold parts or weights; use-phase or end-of-life claims; incompatible weighing functions or rated conditions; unrepresented sites or families
required_metadata	PCR id and version; model or family; automation mode; metrological qualifiers; net product mass; accessories; make-or-buy boundary; process applicability; factory geography; technology; period; allocation drivers; upstream datasets; packaging
required_quality_disclosure	foreground and estimated shares; meter and stock coverage; mass-balance result; missing flows; UUID gaps; factor limitations; representativeness; allocation sensitivity; excluded or outsourced operations
update_trigger	material change in architecture, rated function, bill of materials, supplier route, factory process, energy mix, cleaning route, packaging, allocation method, regulation, metrological specification, or representative data period

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	United Nations Statistics Division, CPC Ver. 3.0 Structure, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-06)	Exact CPC 43922 category identity and exclusion wording
oiml-r76-1-2006	standard	OIML R 76-1:2006, Non-automatic weighing instruments, https://www.oiml.org/en/files/pdf_r/r076-1-e06.pdf (retrieved 2026-09-06)	Non-automatic instrument scope, mass units, capacity, interval, accuracy, and test-condition qualifiers
oiml-r51-1-2006	standard	OIML R 51-1:2006, Automatic catchweighing instruments, https://www.oiml.org/en/files/pdf_r/r051-1-e06.pdf (retrieved 2026-09-06)	Automatic catchweigher scope, application categories, accuracy, and performance qualifiers
eu-directive-2014-32	official_guidance	Directive 2014/32/EU, Annex VIII (MI-006), http://data.europa.eu/eli/dir/2014/32/oj (retrieved 2026-09-06)	Automatic weighing-instrument definitions and rated capacity, supply, mechanical, climatic, and product-characteristic qualifiers