Parts and accessories for the goods of subclass 48315

1. Scope and Applicability

This PCR applies to separately saleable parts and accessories that the producer identifies for use with liquid crystal devices n.e.c., lasers other than laser diodes, or other optical appliances and instruments n.e.c. in the CPC 48315 product family. It covers factory-gate production from received materials and components through the site-performed fabrication, cleaning, assembly, performance verification, and packaging steps declared for the product configuration.

The PCR excludes complete CPC 48315 devices; laser diodes; general-purpose fasteners, cables, power supplies, printed wiring boards, and similar goods when sold independently; optical fibres, optical elements, photographic goods, and other products classified separately; installation, use, maintenance, and end-of-life of the parent device; and upstream production already represented by linked supplier or background datasets. Every actual bill-of-material, utility, packaging, waste, and direct-emission exchange must be represented as an atomic dataset row even when it is not one of the common rows below. Classification context is evidence of scope, not by itself a methodology identity or accepted mapping.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.medical-appliances-precision-and-optical-instruments-watches-and-clocks.parts-and-accessories-for-the-goods-of-subclass-48315
classification_refs	CPC 3.0:48354, Parts and accessories for the goods of subclass 48315 (exact classification context)
covered_products	Dedicated mechanical, electrical, thermal-control, interface, housing, mounting, control, and subassembly parts or accessories separately supplied for one declared CPC 48315 device family
excluded_products	Complete CPC 48315 devices; laser diodes; general-purpose goods not identified for the parent device; and optical, photographic, electronic, or other products separately classified elsewhere
representative_product	One finished, separately saleable part or accessory for a declared liquid-crystal-device, non-diode-laser, or other CPC 48315 optical-appliance family
production_route	Receipt of product-specific materials and components; site-performed fabrication or forming where applicable; cleaning where applicable; assembly and performance verification; factory-gate packaging
market_state	Finished, conforming, and packaged at the manufacturing gate, with product family, compatibility, material state, manufacturing route, and delivery configuration declared

3. Reference Flow

Field	Value
What	Provide a finished part or accessory that performs its declared structural, interface, electrical, thermal, mounting, control, or other specified function in a named CPC 48315 parent-device family
How much	1 kg net mass of conforming finished part or accessory, excluding transport packaging
How well	Meets the producer-declared drawing, material grade, dimensional tolerance, cleanliness, interface, compatibility, and functional acceptance criteria applicable to the supplied product
How long or cycle	One factory-gate production and release cycle; no service life is asserted unless a separate study defines it
reference_flow_link	The net mass of the conforming output row reference_product equals the 1 kg functional-unit amount

Field	Value
Reference amount	1 kg net finished product
Reference product flow	Parts and accessories for the goods of subclass 48315 (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	parent-device family (liquid crystal device n.e.c., laser other than laser diode, or other optical appliance/instrument n.e.c.); part or accessory type and function; model and compatibility; material composition and supplied form; net product mass; manufacturing and cleaning route; acceptance specification and test; production site and geography; reference period; packaging configuration

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
measurement_reference_mass	Reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Measure net conforming product mass after final acceptance and exclude transport packaging. Normalize all exchanges to exactly 1 kg of this net output.
measurement_bom_mass	Material, component, packaging, and solid-waste rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use product-specific BOM, issue/return, purchase, and weigh records. Declare grade, form, recycled content when known, and whether the amount is gross issued mass or net consumed mass.
measurement_electricity	Purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve metered electricity before normalization. Convert kWh to MJ using 1 kWh = 3.6 MJ and disclose any allocation from shared meters.
measurement_water_mass	Process water	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use metered or invoiced mass. A volume record may be converted only with a documented measured or supplier-specific density for the applicable state.
measurement_wastewater_volume	Cleaning wastewater	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Record the volume transferred to treatment or discharge. If derived from mass, retain the density and conversion record.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Product-specific raw materials, purchased components, cleaning agents, utilities, and packaging arrive at the foreground manufacturing site with amount, supplied form, supplier geography, and upstream dataset link recorded
starting_condition_role	purchased_input
product_classification_scope	Dedicated parts and accessories for one declared CPC 48315 parent-device family; classification acceptance remains outside this PCR
recursive_input_rule	A purchased part or accessory in this same semantic category is recorded once as an atomic product input and linked to its upstream dataset; do not expand the supplier dataset inside the foreground process or create a self-referential loop
upstream_dataset_requirement	Link every purchased material, component, energy carrier, water supply, packaging item, and off-site waste-treatment service to geographically and technologically representative upstream data; disclose missing or proxy links
disclosure	Declare the parent-device family, output function and compatibility, material and component BOM, site-performed route, outsourced steps, cleaning chemistry, acceptance tests, reference period, geography, yield, wastes, direct emissions, and packaging configuration

rule_id	Applies to	Rule	source_ids
system_boundary_rule_1	foreground_gate_to_gate	Include all site-performed fabrication, forming, cleaning, assembly, performance verification, rework, and packaging activities used for the declared product configuration, including supporting energy and waste handling attributable to them.	eu-pef-method-2021
system_boundary_rule_2	bill_of_materials_and_outputs	Use a product-specific BOM and company-specific manufacturing data. Record all known material, energy, water, product, waste, and direct elementary flows as individual exchanges; an unlisted actual flow is not a permitted cut-off.	eu-pef-method-2021
system_boundary_rule_3	conditional_routes	Include a conditional exchange only when the declared product and route use it; otherwise document the exchange as not applicable rather than assigning zero by assumption.
system_boundary_rule_4	excluded_life_cycle_stages	Exclude installation, use, maintenance, and end-of-life of the parent device from this factory-gate dataset. Any expanded study must model those stages separately without changing this reference flow.
system_boundary_rule_5	solvent_cleaning	When solvent cleaning occurs, include solvent purchases, inventory change, recovered or reused solvent, spent solvent, solvent in wastewater, and direct VOC emissions in a reconciled solvent balance.	us-epa-industrial-cleaning-solvents-2006

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
parts_manufacturing	Parts and accessories manufacturing and factory-gate preparation	required	Always include; within this aggregate process, individual fabrication materials, cleaning exchanges, and packaging exchanges apply only when present in the declared product BOM and site route	Foreground manufacturing, acceptance, and factory-gate preparation	1 kg net conforming finished part or accessory

Process: Parts and accessories manufacturing and factory-gate preparation (parts_manufacturing)

Inputs

Product flows

Wrought aluminium alloy for fabricated bodies or mounts (wrought_aluminium_alloy)

Record wrought aluminium alloy only when it is issued to and transformed within the foreground route; keep alloy grade and supplied form with the raw record.

• Selected flow: Wrought aluminium alloy (Tiangong UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: measured net consumed mass from product-specific issue, return, and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom_materials
• Sources:

Stainless steel for fabricated bodies, fasteners, or mounts (stainless_steel)

Record stainless steel only when it is present in the product-specific BOM and crosses the foreground boundary for transformation or assembly.

• Selected flow: Stainless steel 84c2403f-5062-5d68-8276-838384d32b89
• Flow property / unit: Mass / kg
• Amount rule: measured net consumed mass from product-specific issue, return, and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom_materials
• Sources:

ABS granulate for moulded housings or interfaces (abs_granulate)

Record ABS granulate only when an ABS part is moulded within the foreground route; declare resin grade, additives, and recycled content when known.

• Selected flow: Acrylonitrile-butadiene-styrene (ABS) copolymer, granulate 8f1317c1-aa51-4524-8692-74079c923e2c
• Flow property / unit: Mass / kg
• Amount rule: measured net consumed granulate from product-specific issue, return, and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom_materials
• Sources:

Copper wire rod for in-house conductor fabrication (copper_wire_rod)

Record copper wire rod only when it is drawn or otherwise transformed into an electrical or thermal conductor within the foreground route.

• Selected flow: Copper wire rod 99715c69-4245-44ff-a438-0e0d68377386
• Flow property / unit: Mass / kg
• Amount rule: measured net consumed mass from product-specific issue, return, and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom_materials
• Sources:

Purchased electricity (electricity)

Record electricity delivered to site equipment for the declared fabrication, cleaning, assembly, testing, rework, packaging, and attributable supporting operations.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: metered electricity attributable to the declared product and reporting period, converted to MJ before normalization
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity
• Sources:

Process water for aqueous cleaning (process_water)

Record process water only when it is supplied for aqueous cleaning or rinsing of the declared product or its in-scope parts.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered or invoiced process-water mass attributable to the declared cleaning route
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_inputs
• Sources:

Isopropanol for precision cleaning (isopropanol)

Record isopropanol only when it is used to clean the declared product, production parts, or dedicated product-contact tooling; distinguish fresh, recovered, and reused solvent in the raw records.

• Selected flow: Isopropanol a4a75541-e156-4e30-947c-ba067a682afd
• Flow property / unit: Mass / kg
• Amount rule: purchased plus opening inventory minus closing inventory, returns, and transfers, reconciled with recovered solvent and outputs
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_solvent_balance
• Sources: us-epa-industrial-cleaning-solvents-2006

Corrugated cardboard for factory-gate packaging (corrugated_cardboard)

Record corrugated cardboard only when it remains in the delivery configuration at the factory gate; other actual packaging materials must be added as separate atomic rows.

• Selected flow: Corrugated cardboard 8bde297e-98df-463f-bcb4-0db52bf6e0b5
• Flow property / unit: Mass / kg
• Amount rule: measured packaging mass assigned from the product-specific shipping configuration
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging
• Sources:

Waste flows

No waste input is prescribed. Any secondary material entering as a waste flow must be represented by its own atomic identity and route-specific evidence.

Elementary flows

No elementary input is prescribed. Any directly abstracted resource must be added as its own atomic elementary flow.

Outputs

Product flows

Conforming finished part or accessory (reference_product)

This is the declared reference output after acceptance testing and before shipment; the amount excludes transport packaging.

• Selected flow: Parts and accessories for the goods of subclass 48315 (Tiangong UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: exactly 1 kg net conforming finished product by definition of the reference flow
• Value mode: Fixed value (fixed_value)
• Specificity: Generic (generic)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Method formula (method_formula)
• Collection protocol: cp_product_output
• Sources: eu-pef-method-2021

Waste flows

Aluminium scrap from foreground fabrication (aluminium_scrap)

Record segregated aluminium chips, swarf, offcuts, and rejected aluminium pieces leaving the foreground process; declare alloy, contamination, recovery route, and destination.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred from the foreground process to recovery or treatment
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Stainless-steel machining scrap from foreground fabrication (stainless_steel_machining_scrap)

Record stainless-steel chips, swarf, offcuts, and rejected stainless-steel pieces separately from carbon-steel waste and retain the alloy grade and destination.

• Selected flow: Stainless-steel machining scrap (Tiangong UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred from the foreground process to recovery or treatment
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Spent isopropanol cleaning solvent (spent_isopropanol)

Record spent isopropanol collected for on-site recovery, off-site recovery, or disposal separately from wastewater and lubricating oil.

• Selected flow: Spent isopropanol cleaning solvent (Tiangong UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: measured mass in waste manifests, recovery records, and closing waste inventory
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_solvent_balance
• Sources: us-epa-industrial-cleaning-solvents-2006

Wastewater from aqueous precision cleaning (cleaning_wastewater)

Record the aqueous cleaning effluent leaving the foreground process for treatment or discharge, with treatment state and contaminant profile retained as qualifiers.

• Selected flow: Wastewater ba1c2ea5-0ea3-4981-a893-45a0650fea62
• Flow property / unit: Volume / m3
• Amount rule: measured effluent volume transferred to treatment or discharge
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Elementary flows

Isopropanol emitted to air (isopropanol_to_air)

Record direct isopropanol releases from cleaning, storage, transfer, and drying after accounting for capture or abatement; do not include upstream solvent-production emissions.

• Selected flow: isopropanol fe0acd60-3ddc-11dd-a843-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: measured release or residual of a documented site solvent mass balance after recovered solvent, spent solvent, wastewater content, and retained solvent are subtracted
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished part or accessory
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_solvent_balance
• Sources: us-epa-industrial-cleaning-solvents-2006

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_rule_1	independently_meterable_operations	Avoid allocation by subdividing and directly measuring product-specific material, energy, water, solvent, packaging, waste, and emission records wherever practicable.	eu-pef-method-2021
allocation_rule_2	shared_manufacturing_inputs	When direct measurement is unavailable, allocate a shared flow with a documented physical driver that reflects causality, in the order machine or process time, measured throughput, or net conforming product mass; do not allocate by revenue unless physical drivers are demonstrably unavailable.	eu-pef-method-2021
allocation_rule_3	scrap_recovery_and_waste_treatment	Report the full mass leaving as each waste flow and link the actual recovery or treatment route. Do not subtract an avoided-burden credit inside the foreground inventory; disclose any downstream recycling convention separately.
allocation_rule_4	rework_and_rejects	Assign rework energy and materials and unrecovered reject burdens to the product configuration that generated them, using product-specific records or the same causal driver as the originating operation.

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_bom_materials	parts_manufacturing	Product-specific material inputs	BOM, issue/return transaction, purchase receipt, and stock record	material identity; grade; supplied form; supplier; lot; gross issued mass; returned mass; inventory change; recycled content; product model; conforming output mass	Reconcile the approved BOM to ERP and stores transactions and retain lot-level exceptions	kg	Per lot, aggregated for the reporting period	One representative production year or a complete declared campaign	All foreground operations at the declared manufacturing site	Sum net consumed mass by atomic material identity and divide by net conforming output mass	Approved BOM revision, transaction extract, supplier specification, scale calibration, and reconciliation sign-off
cp_electricity	parts_manufacturing	Purchased electricity	Meter, submeter, equipment log, and production record	meter identifier; opening and closing reading; kWh; equipment; process time; product model; reporting period; conforming output mass	Prefer direct submetering; otherwise allocate a reconciled site meter using documented equipment time or throughput	kWh and MJ	Monthly or per campaign	Same period as product output, normally 12 consecutive months	Declared site and all attributable in-scope operations	Convert kWh to MJ, subtract documented out-of-scope loads, allocate shared loads, and divide by net conforming output mass	Meter calibration or invoice reconciliation, allocation worksheet, and production log
cp_cleaning_inputs	parts_manufacturing	Aqueous cleaning inputs	Water meter, invoice, batch sheet, and cleaning-equipment log	water amount; source; cleaning line; batch; product model; reuse volume or mass; date; conforming output mass	Reconcile meter or invoice totals to batch and equipment records	kg	Per batch or monthly	Same period as product output	Declared site cleaning operations	Sum net water supplied after documented internal reuse and divide by net conforming output mass	Meter or invoice, batch sheets, density record when converted, and reconciliation
cp_solvent_balance	parts_manufacturing	Isopropanol input, waste, and direct air emission	Purchase, tank or container inventory, issue/return, recovery, waste manifest, wastewater analysis, and emission measurement	opening stock; purchases; transfers; closing stock; recovered mass; reused mass; spent-solvent mass; solvent in wastewater; product retention; measured air release; abatement capture; product model; output mass	Establish a closed-period solvent mass balance and investigate unexplained residuals	kg	Per batch with monthly or campaign closure	Complete reporting period aligned to product output	All isopropanol storage, transfer, cleaning, drying, recovery, and waste points at the site	Reconcile inputs to inventory change, recovery, wastes, retained solvent, and direct emissions; normalize each result to net conforming output mass	Inventory sheets, calibrated scales or meters, recovery logs, waste manifests, analytical results, emission records, and signed balance
cp_packaging	parts_manufacturing	Factory-gate packaging inputs	Packaging BOM, purchase specification, packing instruction, and sample weigh record	packaging item identity; material; unit mass; units per shipment; products per shipment; reused cycles where verified; product model	Weigh each packaging component or use supplier mass verified by periodic sample weighing	kg	Per packaging configuration and when it changes	Current shipping configuration within the reporting period	Packaging applied before the factory gate	Multiply verified unit mass by units used and allocate by products per shipment, then divide by net product mass	Approved packing instruction, supplier specification, sample scale record, and change control
cp_waste_outputs	parts_manufacturing	Material scrap and cleaning wastewater	Segregated bin weigh ticket, waste manifest, effluent meter, discharge record, and treatment transfer	waste identity; material or contaminant; mass or volume; date; product model or line; treatment state; recovery or treatment destination; output mass	Keep material-specific waste streams separate and reconcile internal logs to transporter or treatment records	kg or m3	Per transfer, aggregated monthly	Same period as product output	All in-scope foreground operations and on-site collection points	Sum each atomic waste flow, allocate shared streams with documented causal drivers, and divide by net conforming output mass	Calibrated scale or flow meter, manifest, treatment receipt, analytical profile where relevant, and reconciliation
cp_product_output	parts_manufacturing	Conforming reference product	Production, final inspection, and shipment release record	product identity; parent-device family; model; compatibility; serial or lot; net mass; accepted quantity; rejected quantity; test result; date	Weigh or calculate verified net mass only after final acceptance; reconcile to released production	kg	Per lot	Same period as all foreground inputs and outputs	Declared manufacturing site	Sum accepted net product mass; use it as the denominator for all normalized exchanges	Calibrated scale, final inspection record, test record, release authorization, and production reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calculation_rule_1	normalized inventory rows	normalized amount = attributable reporting-period flow amount / net conforming reporting-period output mass	Atomic flow amount; net conforming output mass	Flow amount per 1 kg reference product	eu-pef-method-2021
calculation_rule_2	electricity	electricity (MJ/kg) = attributable electricity (kWh) × 3.6 / net conforming output mass (kg)	Metered or allocated kWh; conforming output mass	MJ per 1 kg reference product
calculation_rule_3	net material consumption	net consumed mass = opening stock + receipts + transfers in − closing stock − returns − transfers out; reconcile the result to BOM issues and measured waste	Inventory and transaction fields; BOM; waste mass	kg of each atomic input per 1 kg reference product
calculation_rule_4	isopropanol mass balance	direct unaccounted release = opening stock + purchases + transfers in − closing stock − transfers out − recovered solvent − spent-solvent waste − isopropanol in wastewater − verified product retention; replace the residual with direct measurement when available and do not report a negative result	Solvent inventory, purchase, transfer, recovery, waste, wastewater-analysis, retention, and measurement records	kg isopropanol to air per 1 kg reference product, with reconciliation residual disclosed	us-epa-industrial-cleaning-solvents-2006

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
data_quality_1	Product and flow identity	Each row names one physical, chemical, energy, waste, or elementary exchange and carries its applicable form, grade, compartment, treatment state, and supplier or destination qualifiers.	Approved BOM, specifications, manifests, direct-read UUID audit, and atomic-flow review
data_quality_2	Completeness	Reconcile the product-specific BOM and all known inputs and outputs to production, inventory, utility, waste, and emissions records. Explain every excluded or unlinked actual exchange.	Completeness checklist, balances, reconciliation sign-off, and exception log
data_quality_3	Temporal representativeness	Use one representative 12-month period where continuous production exists, or a complete declared campaign for intermittent production; align all numerator and denominator records.	Dated source extracts, campaign definition, and period-alignment check
data_quality_4	Technological and geographical representativeness	Match site technology, material grades, cleaning route, electricity geography, supplier geography, and waste destinations; disclose proxies and their effect on interpretation.	Process description, supplier records, dataset metadata, and proxy register
data_quality_5	Measurement and uncertainty	Retain calibration status, measurement resolution, allocation basis, missing-data treatment, and material- or solvent-balance residuals; investigate material residuals before release.	Calibration certificates, allocation worksheet, uncertainty record, and reviewer sign-off
data_quality_6	Data verification	A reviewer independent of data preparation checks reference-flow normalization, UUID semantics, conditional-route applicability, balances, source links, and bilingual consistency.	Completed verification record and resolved findings

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_rule_1	reference_flow	Confirm that reference_product is a conforming CPC 48354 part or accessory for a declared CPC 48315 parent-device family and that its net output is exactly 1 kg excluding transport packaging.	un-cpc-3-0-structure-2025; eu-pef-method-2021
validation_rule_2	required_qualifiers	Reject a dataset that omits parent-device family, part/accessory function, compatibility, composition, manufacturing route, acceptance specification, site, period, or packaging configuration.
validation_rule_3	atomic_inventory	Confirm that every actual BOM, utility, packaging, waste, and direct emission is represented by one atomic exchange with correct direction, flow type, property, unit, and route condition.	eu-pef-method-2021
validation_rule_4	tiangong_uuid_identity	Confirm every populated Tiangong UUID by a public state-100 direct read against English and Chinese baseName, flow type, classification, property, unit group, product state, geography, technology, and generalComment; keep unresolved rows blank rather than substituting proxies.
validation_rule_5	conditional_routes	Confirm that aluminium, stainless steel, ABS, copper, aqueous cleaning, isopropanol cleaning, and corrugated-cardboard rows are included only when the declared BOM and site route use them; add any different actual material or process flow as a separate atomic row.
validation_rule_6	mass_and_solvent_balance	Reconcile material input, conforming output, material-specific scrap, other actual outputs, and inventory change; where isopropanol is used, separately reconcile solvent input, recovery, waste, wastewater content, retention, and air release.	us-epa-industrial-cleaning-solvents-2006
validation_rule_7	data_quality_and_sources	Confirm period alignment, calibration, product-specific company data, upstream dataset links, proxy disclosure, calculation reproducibility, and source-id resolution before dataset release.	eu-pef-method-2021

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset
downstream_use	background_dataset for production of a named liquid-crystal device n.e.c., laser other than a laser diode, or other optical appliance/instrument n.e.c.; may also support a product-specific foreground assembly model
allowed_use	Factory-gate modelling of the declared part/accessory configuration where parent-device family, compatibility, composition, route, geography, technology, period, and packaging match the study
excluded_use	Direct comparison of unlike part functions or parent-device families; substitution for a complete CPC 48315 device; use-stage, maintenance, service-life, or end-of-life claims; or application to unreported materials and routes
required_metadata	PCR id and status; product and parent-device identity; function and compatibility; net reference mass; BOM and supplied forms; manufacturing, cleaning, test, rework, and packaging route; site and geography; reporting period; allocation; upstream datasets; waste destinations; unresolved UUIDs and proxies
required_quality_disclosure	Primary-data share; period coverage; calibration and reconciliation status; allocation drivers; material- and solvent-balance residuals; missing flows; proxy datasets; UUID audit status; data-quality review findings
update_trigger	Change in product function or compatibility, material or component BOM, manufacturing or cleaning technology, site or electricity geography, allocation driver, supplier mix, waste route, packaging configuration, acceptance test, or a material change in measured normalized exchanges

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 (accessed 2026-09-07)	Official CPC 48354 title, hierarchy, and relation to CPC 48315
un-cpc-1-1-chinese-2004	official_guidance	United Nations Statistics Division, Central Product Classification Version 1.1, Chinese edition, https://unstats.un.org/unsd/publication/SeriesM/M_77ver1_1c.pdf (accessed 2026-09-07)	Professional Chinese terminology for parts and accessories and the CPC 48315 product family
eu-pef-method-2021	official_guidance	European Commission, Recommendation (EU) 2021/2279 on the Product Environmental Footprint method, https://eur-lex.europa.eu/eli/reco/2021/2279/2021-12-30/eng (accessed 2026-09-07)	Functional-unit and reference-flow framing; product-specific BOM; company-specific manufacturing data; completeness; allocation; data quality; verification
us-epa-industrial-cleaning-solvents-2006	official_guidance	U.S. Environmental Protection Agency, Control Techniques Guidelines: Industrial Cleaning Solvents, EPA453/R-06-001, September 2006, https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P1009NYV.TXT (accessed 2026-09-07)	Conditional cleaning of parts, laser hardware and precision optics; solvent accounting; spent-solvent handling; direct VOC emissions