Other office machines

1. Scope and Applicability

This PCR covers manufacture of the residual office-machine products identified by CPC 3.0 subclass 45160. The official detail includes hectograph and stencil duplicating machines; letter closing, opening, folding, sealing and sorting machines; addressing machines; machines for affixing or cancelling postage stamps; cash registers and ticket-issuing machines without a calculating device; coin-counting machines; pencil-sharpening machines; perforating or stapling machines; and paper shredders. It excludes calculating-device ticket machines and cash registers classified in 45141, and network-connectable ATMs and cash registers classified in 45142.

The PCR supports cradle-to-gate foreground data packages for a declared machine model. Because the subclass contains mechanical and electromechanical products with different bills of materials, optional functions are represented by conditional processes rather than by a cross-product inventory expansion. The declared model, rated office function, power architecture, production route, manufacturing geography, packaging configuration, and net product mass are mandatory qualifiers.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.office-accounting-and-computing-machinery.other-office-machines
classification_refs	CPC 3.0: 45160 Other office machines
covered_products	Office machines within the official CPC 45160 inclusion note, including paper shredders, non-calculating mail-handling and ticket machines, coin-counting machines, pencil-sharpening machines, and perforating or stapling machines
excluded_products	Products classified as photocopiers, printers, facsimile machines, computing peripherals, calculating-device machines in CPC 45141, network-connectable ATMs or cash registers in CPC 45142, and separately supplied parts or accessories
representative_product	Electric paper shredder, used only to organize conditional electrical and plastic-component rules and not to narrow the category
production_route	Receipt of purchased materials and components; conditional mechanical component fabrication; conditional electrical component integration; final assembly, acceptance testing, and packaging
market_state	Finished, tested, packaged machine at the manufacturing site gate, identified by model and configuration

3. Reference Flow

Field	Value
What	Production of a declared CPC 45160 office-machine model that performs its stated office function
How much	1 kg net mass of finished machine, excluding transport packaging
How well	The declared model passes the manufacturer's documented functional, safety, and quality acceptance criteria
How long or cycle	One completed production lot; use-stage service life is outside this cradle-to-gate unit and must be declared separately in a lifecycle model
reference_flow_link	finished_other_office_machine

Field	Value
Reference amount	1 kg
Reference product flow	Other office machine
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	model identifier; office function; rated capacity or throughput; power architecture; net product mass; manufacturing sites and geography; included production stages; packaging configuration; acceptance-test basis

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. No exact TianGong reference-product UUID was confirmed; the identity remains explicitly unresolved in the manifest.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_net_mass	finished reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Measure finished machine mass after acceptance testing and before transport packaging; exclude manuals, loose consumables, and packaging unless they are integral to the saleable machine configuration, and disclose every inclusion.
lot_normalization	all inventory exchanges	row-specific property	row-specific unit	Sum exchanges for the same production lot and divide by conforming finished-product net mass in kg; exclude rejected units from the denominator and record their materials and treatment separately.
electricity_conversion	electricity rows	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve the meter's energy basis and convert kWh to MJ using 1 kWh = 3.6 MJ; disclose whether auxiliary loads and line losses are included.
component_mass_accounting	purchased and fabricated components	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use receipt, issue, return, and measured scrap records to reconcile material incorporated into conforming output; do not substitute item counts without a documented model-specific mass conversion.

5. System Boundary

The foreground boundary begins when purchased materials and components are received at each declared manufacturing site and ends with the conforming, packaged machine at the site gate. Upstream production of purchased inputs is represented by linked upstream datasets. Include on-site component fabrication, electrical integration, assembly, testing, rework, and packaging when performed for the declared model. Use and end-of-life stages are outside this cradle-to-gate data package, although a downstream lifecycle model may add them using separately declared scenarios.

rule_id	Applies to	Rule	source_ids
boundary_site_gate	declared manufacturing sites	Include all material, component, energy, waste, and direct elementary exchanges from receipt at the manufacturing site through release of the packaged conforming machine; identify outsourced stages and link their datasets rather than silently excluding them.	un-cpc-3-0-detail-45160
boundary_conditional_routes	model-specific production route	Include mechanical fabrication only when performed within the declared foreground, and include electrical integration only when the declared model contains electrical or electronic components; otherwise mark the process not applicable and explain the purchased-component boundary.	hk-green-procurement-paper-shredder-2022; japan-green-procurement-2020
boundary_specific_exchanges	bills of materials and waste registers	Extend the inventory with additional model-specific exchanges as separate atomic rows; do not aggregate unnamed materials, utilities, packaging, or wastes into an umbrella flow.
boundary_use_stage	downstream lifecycle model	Do not include use electricity, consumables, maintenance, or end-of-life treatment in the manufacturing data package; declare them as separate processes when constructing a lifecycle model.	japan-green-procurement-2020

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased materials and components received at the gate of each declared manufacturing site
starting_condition_role	Foreground manufacturing entry condition
product_classification_scope	CPC 3.0 subclass 45160 only, interpreted by its official inclusion and exclusion note
recursive_input_rule	A purchased CPC 45160 machine incorporated into another covered machine is recorded as a product input with its own upstream dataset and model identifier; its manufacture is not recursively expanded inside the receiving process.
upstream_dataset_requirement	Every purchased material, component, electricity, and packaging input requires a geographically and technologically representative upstream dataset or an explicit documented data gap.
disclosure	Declare sites, outsourced stages, purchased-versus-made components, model configuration, production period, net output mass, allocation, cut-offs, and every omitted or not-applicable process.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
mechanical_component_fabrication	Mechanical component fabrication	conditional	Include when steel forming or ABS moulding for the declared model occurs within the reporting foreground.	Manufacture structural, housing, cutting, or mechanism components.	kg conforming fabricated components transferred to assembly
electrical_component_integration	Electrical component integration and test	conditional	Include when the declared model contains a motor or printed wire board and integration or electrical testing occurs within the reporting foreground.	Integrate and test electrical or electronic functional components.	kg accepted electrical assemblies transferred to final assembly
final_assembly_testing_packaging	Final assembly, acceptance testing, and packaging	required	Always include for the declared finished model.	Assemble components, perform acceptance tests, package conforming output, and release it at the site gate.	1 kg net finished machine output

Process: Mechanical component fabrication (mechanical_component_fabrication)

Inputs

Product flows

Cold-rolled steel sheet for formed parts (cold_rolled_steel_sheet)

Record cold-rolled steel sheet issued to cutting, stamping, bending, or forming when those operations are inside the declared foreground. The TianGong UUID remains unresolved because the highest-ranked bilingual identity is inconsistent.

• Selected flow: Cold-rolled steel sheet
• Flow property / unit: Mass / kg
• Amount rule: measured steel-sheet issues minus documented unused returns for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_mass_balance
• Sources:

ABS molding resin (abs_granulate)

Record ABS granulate issued to molding only when ABS component molding occurs inside the declared foreground; retain grade and recycled-content records.

• Selected flow: Acrylonitrile butadiene styrene (ABS) granulate b895c3a1-076e-4a42-a2c0-6088890c0bd9
• Flow property / unit: Mass / kg
• Amount rule: measured ABS granulate issues minus documented unused resin returns for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_mass_balance
• Sources: hk-green-procurement-paper-shredder-2022; japan-green-procurement-2020

Fabrication electricity (component_fabrication_electricity)

Record purchased electricity consumed by in-boundary metal forming and ABS molding equipment, including assigned auxiliary loads.

• Selected flow: Electricity 67b723a9-6f63-4802-adca-b52ce7967d47
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or a documented allocation from a calibrated site meter for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_fabrication_electricity
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Post-industrial steel scrap (post_industrial_steel_scrap)

Record segregated ferrous offcuts and rejected formed steel parts leaving the process for reuse, recycling, or treatment; disclose destination and contamination.

• Selected flow: Post-industrial steel scrap c143745d-be4f-4d8f-b403-2dcbfe685349
• Flow property / unit: Mass / kg
• Amount rule: measured net mass transferred out as ferrous manufacturing scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_mass_balance
• Sources:

ABS molding scrap (abs_moulding_scrap)

Record segregated ABS sprues, runners, purge, and rejected ABS parts that leave the process. Do not combine them with other polymers or packaging waste.

• Selected flow: ABS molding scrap
• Flow property / unit: Mass / kg
• Amount rule: measured net ABS scrap transferred out after any documented in-process regrind return
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_mass_balance
• Sources:

Elementary flows

Process: Electrical component integration and test (electrical_component_integration)

Inputs

Product flows

Printed wire board (printed_wire_board)

Record each printed wire board incorporated into the declared model when the electrical integration process applies; preserve board specification and supplier identity.

• Selected flow: Printed Wire Board a8bd954c-59b3-4317-b4de-02a17d6da5ca
• Flow property / unit: Mass / kg
• Amount rule: measured mass of printed wire boards issued minus unused returns for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electrical_component_mass_balance
• Sources: hk-green-procurement-paper-shredder-2022

Electric motor (electric_motor)

Record the motor incorporated into motorized models; declare motor type, rated output, voltage, and supplier.

• Selected flow: Electric motor 014f80a3-c257-425b-9b75-3e5a18573695
• Flow property / unit: Mass / kg
• Amount rule: measured mass of motors issued minus unused returns for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electrical_component_mass_balance
• Sources: japan-green-procurement-2020

Electrical integration and test electricity (electrical_integration_electricity)

Record purchased electricity used for board population or connection, motor integration, firmware loading when applicable, and electrical testing within the declared foreground.

• Selected flow: Electricity 67b723a9-6f63-4802-adca-b52ce7967d47
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or a documented allocation from a calibrated site meter for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electrical_integration_electricity
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Rejected populated printed wiring board (waste_populated_printed_wiring_board)

Record populated boards rejected from integration or testing and transferred as waste; declare hazardous characteristics and destination.

• Selected flow: Waste populated printed wiring board eb5ffe4a-49af-450c-9a31-3efdfd343f8a
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of rejected populated boards transferred to waste management
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electrical_component_mass_balance
• Sources:

Elementary flows

Process: Final assembly, acceptance testing, and packaging (final_assembly_testing_packaging)

Inputs

Product flows

Final assembly and acceptance-test electricity (final_assembly_electricity)

Record purchased electricity consumed by final assembly tools, functional acceptance tests, and allocated line auxiliaries. Use-stage testing beyond release criteria is not included.

• Selected flow: Electricity 67b723a9-6f63-4802-adca-b52ce7967d47
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or a documented allocation from a calibrated site meter for the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_final_assembly_electricity
• Sources:

Corrugated board box (corrugated_board_box)

Record the corrugated board box delivered with the declared model; dimensions, recycled content, and packaging configuration must match the foreground product.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured mass of corrugated board boxes consumed for conforming finished units
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_mass
• Sources: japan-green-procurement-2020

Waste flows

Elementary flows

Outputs

Product flows

Finished other office machine (finished_other_office_machine)

Record only conforming machines released after acceptance testing. The selected flow remains without a TianGong UUID until an exact CPC 45160 state-100 identity is available.

• Selected flow: Other office machine
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of conforming finished machines before transport packaging
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg net finished machine output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finished_product_mass
• Sources: un-cpc-3-0-structure-2025; un-cpc-3-0-detail-45160

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision_first	shared manufacturing lines	Prefer process subdivision, submeters, production-order records, and direct material issue records so the declared model receives its measured exchanges.
allocation_physical_driver	unavoidable shared loads	When direct measurement is unavailable, allocate shared electricity and auxiliaries by a documented causal physical driver such as machine time multiplied by rated load; use mass only when causality cannot be established and disclose sensitivity.
allocation_scrap_treatment	scrap and rejected components	Record gross input and measured waste outputs without netting scrap revenue or avoided-production credits inside the foreground process; document any recycling substitution only in a separately declared downstream scenario.	japan-green-procurement-2020
allocation_no_category_average	multiple CPC 45160 models	Do not average mechanically different models unless the represented product mix, production volume weights, functional differences, and all allocation steps are disclosed.

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_component_mass_balance	mechanical_component_fabrication	steel and ABS inputs; steel and ABS scrap outputs	material issue, return, production, and waste-transfer records	material_id; grade; lot; issued_mass; returned_mass; conforming_part_mass; scrap_mass; destination	Reconcile calibrated scale records, warehouse transactions, and waste-transfer tickets by material and production order.	kg	each production lot	all lots in the declared reporting period	every in-boundary fabrication site	Sum net issues and outbound scrap by material, then normalize to conforming finished-product net mass.	scale calibration; transaction reconciliation; signed waste-transfer record
cp_component_fabrication_electricity	mechanical_component_fabrication	fabrication electricity	submeter or site-meter interval record	meter_id; start_reading; end_reading; production_order; operating_time; allocation_driver	Read dedicated submeters or allocate a calibrated site meter using documented equipment time and load.	MJ	each lot or monthly with lot allocation	representative consecutive reporting period	every in-boundary fabrication site	Sum energy for the process and normalize to conforming finished-product net mass.	meter calibration; bill reconciliation; allocation worksheet
cp_electrical_component_mass_balance	electrical_component_integration	printed wire board and motor inputs; rejected populated-board output	bill of materials, issue, return, rejection, and waste-transfer records	component_id; specification; supplier; issued_mass; returned_mass; accepted_mass; rejected_mass; waste_destination	Reconcile production-order component transactions and calibrated mass measurements.	kg	each production lot	all lots in the declared reporting period	every in-boundary electrical integration site	Sum net component issues and rejected-board waste, then normalize to conforming finished-product net mass.	approved bill of materials; scale calibration; rejection disposition
cp_electrical_integration_electricity	electrical_component_integration	integration and test electricity	submeter or site-meter interval record	meter_id; start_reading; end_reading; production_order; test_cycles; allocation_driver	Read dedicated submeters or allocate a calibrated site meter using documented equipment time and load.	MJ	each lot or monthly with lot allocation	representative consecutive reporting period	every in-boundary electrical integration site	Sum energy for the process and normalize to conforming finished-product net mass.	meter calibration; bill reconciliation; allocation worksheet
cp_final_assembly_electricity	final_assembly_testing_packaging	assembly and acceptance-test electricity	submeter or site-meter interval record	meter_id; start_reading; end_reading; production_order; accepted_units; test_cycles; allocation_driver	Read dedicated submeters or allocate a calibrated site meter using documented line time and load.	MJ	each lot or monthly with lot allocation	representative consecutive reporting period	every final assembly site	Sum energy for assembly and release testing and normalize to conforming finished-product net mass.	meter calibration; bill reconciliation; acceptance-test log
cp_packaging_mass	final_assembly_testing_packaging	corrugated board box input	packaging specification, purchase, issue, and return records	packaging_id; material; supplier; issued_mass; returned_mass; packed_units	Reconcile approved packaging specifications with warehouse transactions and calibrated sample masses.	kg	each packaging configuration and lot	all configurations in the declared reporting period	every final assembly site	Sum net box mass consumed and normalize to conforming finished-product net mass.	approved packaging specification; scale calibration; stock reconciliation
cp_finished_product_mass	final_assembly_testing_packaging	conforming finished product output	acceptance and calibrated mass records	model_id; serial_or_lot; configuration; accepted_quantity; net_mass; excluded_accessories; test_status	Weigh a documented representative sample or every unit after acceptance testing and before transport packaging.	kg	each model and configuration; each lot	all conforming output in the declared reporting period	every final assembly site	Sum accepted net product mass; retain sample design and expansion calculations when not every unit is weighed.	scale calibration; acceptance record; sampling record

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_net_material_input	material and component inputs	net input = issued mass - unused returned mass	issued_mass; returned_mass	kg net input by row and lot
calc_reference_normalization	all mass exchanges	normalized amount = row net mass / conforming finished-product net mass	row net mass; accepted net product mass	kg per kg reference flow
calc_energy_normalization	electricity rows	normalized electricity = process electricity in MJ / conforming finished-product net mass in kg	meter difference; conversion factor; allocation driver when used; accepted net product mass	MJ per kg reference flow
calc_component_mass_check	mechanical component fabrication	net material input - outbound scrap - measured conforming component transfer = documented inventory change plus measured process loss	issue; return; scrap; component transfer; inventory change	material-specific mass-balance residual

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_model_identity	reference product	Record model, configuration, rated office function or throughput, motor rating when applicable, power architecture, and acceptance criteria.	approved product specification and acceptance-test record
dq_temporal_coverage	all foreground exchanges	Use a consecutive period representative of normal production, identify startup, shutdown, rework, and abnormal lots, and disclose exclusions.	dated production, meter, warehouse, and waste records
dq_mass_balance	material-bearing processes	Reconcile net inputs, conforming output, inventory change, and each separately recorded waste stream; investigate material-specific residuals.	signed reconciliation worksheet and calibrated measurements
dq_electricity_identity	electricity inputs	Declare grid or supplier mix, voltage, geography, delivery boundary, meter coverage, and any loss treatment.	invoice, supply contract, meter map, and allocation worksheet
dq_substance_and_recyclability	electrical or plastic-bearing models	Declare applicable restricted-substance compliance evidence, recycled-plastic claims, separability information, and waste destinations without converting regulatory limits into empirical inventory ranges.	supplier declarations and product compliance records; hk-green-procurement-paper-shredder-2022; japan-green-procurement-2020
dq_completeness	model-specific inventory	Compare the approved bill of materials, energy-meter map, packaging specification, rejection register, and waste register with inventory rows; add every omitted exchange as one atomic flow or document it as a quantified data gap.	completeness reconciliation signed by the data owner

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity_scope	product identity	Confirm the declared product is within the official CPC 45160 inclusion note and is not a printer, photocopier, computing peripheral, calculating-device machine in 45141, network-connectable ATM or cash register in 45142, or separately supplied part.	un-cpc-3-0-structure-2025; un-cpc-3-0-detail-45160
validate_reference_mass	reference flow	Confirm the normalized finished output equals 1 kg net product mass and that packaging and excluded accessories are consistently treated.
validate_process_applicability	conditional process map	Confirm each conditional process is either populated with foreground rows and records or explicitly marked not applicable with the purchased-component boundary disclosed.
validate_uuid_resolution	TianGong identities	Reject substitution of printers, photocopiers, ink, mixed plastic waste, or other proxy UUIDs for the three unresolved rows; require state-100 direct-read identity before resolution.
validate_inventory_balance	each production lot	Confirm material issues, returns, conforming transfers, separately recorded wastes, and inventory changes reconcile; report residuals and corrective actions.
validate_energy_records	electricity rows	Reconcile process meters to invoices or site meters, prevent overlap among the three electricity rows, and verify the kWh-to-MJ conversion and allocation driver.
validate_bilingual_flow_names	Chinese rendering	Confirm every UUID-bearing Chinese selected flow exactly matches the TianGong state-100 Chinese baseName and that UUID-empty atomic flows remain accurately translated.
validate_range_status	amount metadata	Confirm no externally inferred range is added without two independent, original-text-verified, boundary-compatible sources; retain the manifest evidence need when that condition is unmet.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground cradle-to-gate manufacturing dataset for one declared CPC 45160 office-machine model
downstream_use	May be used as a secondary_dataset or background_dataset after review, and as the manufacturing stage of a lifecyclemodel with separately modelled use and end-of-life stages
allowed_use	Model-specific product comparison, supply-chain assessment, and lifecycle modelling when reference mass, function, configuration, geography, technology, and data period are compatible
excluded_use	Unqualified category-average claims, comparison of unlike office functions, use-stage claims without a declared duty cycle and service life, or proxy substitution for unresolved flow UUIDs
required_metadata	model and configuration; CPC scope; rated function or throughput; net mass; sites and geography; reporting period; purchased-versus-made boundary; electricity supply; packaging; allocation; cut-offs; unresolved identities
required_quality_disclosure	primary-data share; meter and scale coverage; allocation drivers; sampling; mass-balance residuals; rejected units; data gaps; supplier-data age; substance-compliance evidence where applicable
update_trigger	material design or supplier change; production-route or site change; electricity-supply change; packaging redesign; changed acceptance test; new exact TianGong UUID; or foreground records no longer representative

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	United Nations Statistics Division, CPC Version 3.0 Structure, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-08)	Official classification identity and hierarchy for CPC 45160
un-cpc-3-0-detail-45160	official_guidance	United Nations Statistics Division, CPC Version 3.0 classification detail, code 45160. https://unstats.un.org/unsd/classifications/Econ/Structure/Detail/EN/2100/45160 (retrieved 2026-09-08)	Official included and excluded products and semantic category boundary
japan-green-procurement-2020	official_guidance	Ministry of the Environment, Government of Japan, Basic Policy on Promoting Green Procurement, provisional translation, February 2020. https://www.env.go.jp/policy/hozen/green/g-law/archive/bp/r1bp_en.pdf (retrieved 2026-09-08)	Paper-shredder and digital-duplicator evidence for motorized variants, electricity relevance, plastic components, packaging, dismantling, and waste disclosure
hk-green-procurement-paper-shredder-2022	official_guidance	Environment and Ecology Bureau, Hong Kong SAR Government, Green Procurement: Office equipment M04 Paper shredder, last reviewed 10 February 2022. https://www.eeb.gov.hk/en/susdev/green_procure/pdf/M04.pdf (retrieved 2026-09-08)	Paper-shredder evidence for circuit boards, electrical or electronic components, plastic components, and restricted-substance compliance records