Parts and accessories for the goods of subclass 48262

1. Scope and Applicability

This PCR applies to separately supplied parts and accessories made specifically or principally for machines and appliances that test mechanical properties of materials. Covered examples include specimen grips and fixtures, force-application accessories, platens, load-sensing assemblies, extensometer systems, and dedicated electronic modules supplied as testing-machine parts or accessories. The foreground result is a cradle-to-gate data package for one declared product configuration at the manufacturer gate.

Complete machines and appliances for testing mechanical properties are excluded. General-purpose fasteners, generic machine tools, standalone computers, calibration services, test specimens, installation, customer-site use, maintenance, and end-of-life treatment are excluded unless the declared study explicitly expands its boundary. A component built into a complete testing machine is accounted for in the complete-machine product system; it is represented here only when supplied as a separate product.

The category spans materially different products. Comparison is allowed only between products having the same declared part or accessory function, compatible machine interface, performance class, and delivery state. The official CPC identity establishes the semantic boundary; ISO 7500-1 and ISO 9513 identify relevant verification and calibration functions for force-application accessories, force-measuring systems, and extensometer systems.

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-48262
classification_refs	CPC 3.0:48285, exact mapping context; mapping acceptance remains governed outside this PCR
covered_products	Separately supplied grips, fixtures, platens, force-application accessories, load-sensing assemblies, extensometer systems, and dedicated electronic modules for mechanical-properties testing machines
excluded_products	Complete CPC 48262 testing machines; general-purpose fasteners and electronics; unrelated measuring-instrument parts; test specimens; calibration, installation, use, maintenance, and end-of-life services
representative_product	One specified separately supplied mechanical-properties testing-machine part or accessory
production_route	Purchased material and component preparation; conditional machining, forming, finishing, and cleaning; assembly; calibration or verification where applicable; inspection; packaging
market_state	Finished, inspected, separately supplied product at the manufacturer gate, with declared packaging and calibration or conformity documentation where applicable

3. Reference Flow

Field	Value
What	Provide the declared mechanical interface, force application, force sensing, deformation measurement, specimen gripping, or dedicated control function for a compatible mechanical-properties testing machine
How much	1 kg net mass of one specified separately supplied part or accessory, excluding packaging
How well	Meets the declared drawing or part number, compatible-machine interface, performance specification, and calibration or verification class where applicable
How long or cycle	Product delivered at the manufacturer gate; no service life or test-cycle count is assumed for this cradle-to-gate mass reference
reference_flow_link	1 kg net mass of the conforming declared product configuration

Field	Value
Reference amount	1
Reference product flow	Parts and accessories for machines for testing mechanical properties of materials
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	part or accessory type; manufacturer part number or drawing revision; compatible testing-machine model; function; material and component composition; manufacturing route; calibration or verification status and class where applicable; software or firmware state where applicable; net mass; packaging state; production geography; reference 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_net_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Measure conforming product mass without packaging. Normalize every inventory amount to exactly 1 kg net reference product.
material_mass_basis	material, component, waste, and wastewater rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record measured or reconciled mass. When purchase records use item counts or area, retain the measured conversion factor, dimensions, and moisture or coating basis used to obtain kg.
electricity_energy_basis	electricity rows	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve meter readings and convert kWh to MJ using 1 kWh = 3.6 MJ; allocate only documented shared-meter consumption.
water_mass_conversion	process water and wastewater	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Prefer measured mass. If volume is metered, document temperature, density assumption or measured density, and the conversion to kg.

5. System Boundary

The foreground boundary begins with purchased materials and components at the reporting manufacturer's gate and ends with the inspected, conforming, packaged product at that gate. It includes attributable preparation, machining or forming, finishing and cleaning, assembly, calibration or verification, inspection, rework, internal material movements, and packaging. Upstream production and delivery of every purchased input are represented by compatible upstream datasets rather than recreated as foreground operations.

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased materials and components received at the reporting manufacturer gate, with supplier, product form, quantity, recycled-content claim where relevant, and inbound geography declared
starting_condition_role	Cradle-to-gate foreground collection starts at receipt; upstream burdens remain linked through supplier-specific or representative datasets
product_classification_scope	Separately supplied parts and accessories specifically or principally for CPC 48262 mechanical-properties testing machines; complete machines remain outside the reference product
recursive_input_rule	A separately purchased input that itself meets this PCR boundary is recorded as one upstream product exchange with its own compliant dataset; do not recursively reproduce its manufacturing inventory inside the receiving process
upstream_dataset_requirement	Use geographically and technologically representative datasets for each purchased material, component, electricity supply, water supply, and waste treatment route; disclose proxies and data gaps
disclosure	Declare product configuration, BOM coverage, manufacturing and finishing routes, outsourced operations, calibration or verification status, rework, packaging, allocation, cut-offs, geography, and reference period

rule_id	Applies to	Rule	source_ids
boundary_category_scope	product identity	Include only a separately supplied part or accessory for a CPC 48262 mechanical-properties testing machine; reject a complete testing machine or a part for another instrument category.	un-cpc-3-0-structure-2025; un-cpc-3-0-explanatory-notes-2025
boundary_foreground_operations	foreground processes	Include all attributable on-site and outsourced preparation, fabrication, finishing, cleaning, assembly, calibration or verification, inspection, rework, and packaging needed to deliver the conforming reference product.
boundary_upstream_and_waste	purchased inputs and treatment	Link every purchased input and exported waste to an upstream supply or treatment dataset consistent with its declared state, geography, technology, and destination; do not treat upstream emissions as direct foreground exchanges.
boundary_use_and_end_of_life	downstream stages	Exclude installation, use, maintenance, replacement, and end-of-life from the default cradle-to-gate result and disclose any study-specific expansion separately.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
fabrication	Material preparation, fabrication, finishing, and cleaning	conditional	Include each operation actually performed by the reporting manufacturer or an attributable toll processor; omit only when the product is received fully fabricated	Foreground fabrication	1 kg net conforming product output after yield and rework reconciliation
assembly_calibration	Assembly, calibration or verification, and final inspection	required	Always include final product release activities; calibration or verification applies only when required by the product function or declared specification	Foreground assembly and release	1 kg net conforming product released to packaging
packaging	Sales packaging	required	Include the actual packaging configuration; individual packaging material rows apply only when that material is used	Foreground packaging	Packaging attributable to 1 kg net reference product

Process: Material preparation, fabrication, finishing, and cleaning (fabrication)

Inputs

Product flows

Stainless-steel input (stainless_steel)

Record purchased stainless steel only when it enters a fabricated product configuration.

• Selected flow: Stainless steel 84c2403f-5062-5d68-8276-838384d32b89
• Flow property / unit: Mass / kg
• Amount rule: measured received mass consumed, corrected for stock change and returned offcuts
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials
• Sources:

Cold-worked carbon-steel bar input (carbon_steel_bar)

Record cold-worked carbon-steel bar only for product configurations made from that form.

• Selected flow: Carbon Steel b3b18433-8fd1-4298-98f5-8af11eb64762
• Flow property / unit: Mass / kg
• Amount rule: measured received bar mass consumed, corrected for stock change and returned offcuts
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials
• Sources:

Primary aluminium-alloy sheet input (aluminium_alloy_sheet)

Record primary aluminium-alloy sheet only for product configurations fabricated from sheet.

• Selected flow: Primary aluminum alloy sheet 2a9549cc-dc9e-43a7-9379-7a0c0a0e4832
• Flow property / unit: Mass / kg
• Amount rule: measured received sheet mass consumed, corrected for stock change and returned offcuts
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials
• Sources:

Cutting-fluid input (cutting_fluid)

Record cutting fluid only when machining uses it; separately record concentrate or ready-to-use product consistently with purchase state and make-up practice.

• Selected flow: Cutting Fluid 576d250f-4f36-4385-939d-0f03b8f95a10
• Flow property / unit: Mass / kg
• Amount rule: purchased make-up mass consumed, corrected for opening and closing inventory and recovered fluid
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_utilities
• Sources:

Fabrication electricity (fabrication_electricity)

Record electricity attributable to machining, forming, finishing, cleaning, extraction, and supporting equipment within the fabrication boundary.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered use or documented allocation of facility-meter use to the fabrication batch
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_utilities
• Sources:

Process-water input (process_water)

Record water entering cleaning, rinsing, coolant make-up, or other included fabrication operations.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered or batch-record water input converted to mass when necessary
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_utilities
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Mixed machining-metal scrap (mixed_metal_scrap)

Record mixed metal offcuts, chips, and rejected metal pieces crossing the foreground boundary as one mixed waste only when they are not separately sorted by alloy.

• Selected flow: Mixed metal scrap cc3ee2b1-7c5b-44a0-aa6a-559f1bc3ce36
• Flow property / unit: Mass / kg
• Amount rule: measured dispatched scrap mass attributed to the represented product, reconciled with stock and documented recycling or disposal destination
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes
• Sources:

Fabrication wastewater (fabrication_wastewater)

Record aqueous wastewater leaving metalworking or cleaning operations; declare composition, treatment state, and destination.

• Selected flow: Wastewater d2d44ce1-c0f4-461d-9413-f4b33e0d200f
• Flow property / unit: Mass / kg
• Amount rule: measured discharge mass or metered volume converted to mass, excluding internally recirculated water
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes
• Sources:

Elementary flows

Process: Assembly, calibration or verification, and final inspection (assembly_calibration)

Inputs

Product flows

Electronic-components and PCB-assembly input (pcb_assembly)

Record an electronic-components and PCB assembly only when it is incorporated into the declared part or accessory.

• Selected flow: Electronic components and PCB assemblies 1e37f859-cb9b-47ff-8b0b-5b47d65fa236
• Flow property / unit: Mass / kg
• Amount rule: measured installed mass plus attributable assembly rejects, reconciled to the product BOM
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_records
• Sources:

Assembly and test electricity (assembly_test_electricity)

Record electricity attributable to assembly equipment, calibration or verification rigs, inspection, and rework.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered use or documented allocation of facility-meter use to the released batch
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_records
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Process: Sales packaging (packaging)

Inputs

Product flows

Corrugated-cardboard packaging (corrugated_cardboard)

Record corrugated cardboard incorporated into the product's sales packaging.

• Selected flow: Corrugated cardboard 8bde297e-98df-463f-bcb4-0db52bf6e0b5
• Flow property / unit: Mass / kg
• Amount rule: measured packaging mass issued to conforming products, including attributable converting loss
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_records
• Sources:

Polyethylene-film packaging (polyethylene_film)

Record polyethylene protective film only when it is used in the declared sales packaging; its Tiangong UUID remains unresolved.

• Selected flow: Polyethylene film
• Flow property / unit: Mass / kg
• Amount rule: measured film mass issued to conforming products, including attributable converting loss
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_records
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Released reference product (reference_product)

Record the net mass of the inspected and conforming separately supplied part or accessory; packaging is excluded from this mass.

• Selected flow: Parts and accessories for machines for testing mechanical properties of materials
• Flow property / unit: Mass / kg
• Amount rule: exactly 1 kg after normalization from measured released net product mass
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_product_release
• Sources: un-cpc-3-0-structure-2025; un-cpc-3-0-explanatory-notes-2025

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision_first	shared fabrication, assembly, calibration, inspection, and packaging	Avoid allocation by product-specific metering, batch records, BOM issue records, machine time, or physically separated process steps wherever practicable.
allocation_causal_driver	remaining shared inputs and wastes	When subdivision is not practicable, allocate using a documented causal physical driver appropriate to the exchange, such as machine time for equipment electricity, measured mass throughput for material handling, or verified batch count for a batch-specific operation.
allocation_scrap_treatment	mixed metal scrap	Record scrap as a waste output with its actual destination. Do not credit avoided primary metal production inside the foreground inventory unless the selected study method explicitly requires and transparently reports substitution outside the attributional result.
allocation_rework_and_rejects	rework and rejected parts	Attribute rework inputs and rejected-part wastes to the represented conforming production during the reference period; disclose any exceptional campaign excluded from the representative result.

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_fabrication_materials	fabrication	stainless steel, cold-worked carbon-steel bar, and primary aluminium-alloy sheet	purchase, stock, issue, return, and BOM records	material identity; grade; form; supplier; opening stock; receipts; closing stock; returned offcuts; batch output	reconcile material consumption by product configuration and production batch	kg	each batch, aggregated monthly	representative period covering normal product and operating variation, or a complete documented campaign	reporting site and attributable toll processors	consumed mass = opening stock + receipts - closing stock - documented returns; normalize to released net product mass	invoices; weigh tickets; stock ledger; BOM revision; batch traveler
cp_fabrication_utilities	fabrication	cutting fluid, electricity, and process water	chemical issue, tank inventory, meter, and production records	product formulation; concentration; opening and closing stock; purchases; recovered fluid; electricity meter; water meter; operating hours; batch output	use dedicated meters where available; otherwise document allocation from measured totals	kg and MJ	each batch or monthly	same reference period as product output	reporting site and attributable fabrication route	subtract recovered or closing stock; convert electricity and water under section 4; normalize to released net product mass	calibrated meter records; invoices; tank logs; operating log; allocation worksheet
cp_fabrication_wastes	fabrication	mixed metal scrap and fabrication wastewater	waste transfer, weighbridge, wastewater meter, and treatment records	waste identity; mass or volume; composition; treatment state; destination; date; represented production	reconcile dispatched waste, internal recovery, and stock change	kg	each dispatch, aggregated monthly	same reference period as product output	reporting site and attributable toll processors	exported waste = opening waste stock + generated waste - closing waste stock - internal reuse; normalize to released net product mass	manifests; weighbridge tickets; meter calibration; laboratory analysis; treatment receipt
cp_assembly_records	assembly_calibration	PCB assembly and assembly/test electricity	BOM issue, reject, submeter, calibration, and inspection records	PCB identity and revision; installed mass; rejects; meter reading; batch; machine time; calibration or verification result; released mass	reconcile installed components and allocate measured energy to released conforming output	kg and MJ	each batch	same reference period as product output	reporting assembly and test site	installed input plus attributable rejects; energy by submeter or documented causal driver; normalize to released net product mass	BOM; issue record; reject log; meter record; calibration certificate; inspection release
cp_packaging_records	packaging	corrugated cardboard and polyethylene film	packaging specification, issue, purchase, and loss records	material identity; specification; issued mass; returned mass; converting loss; packaged net product mass	weigh representative packaging configurations and reconcile issues to packaged output	kg	each packaging configuration and monthly reconciliation	same reference period as product output	reporting packaging site	net packaging issued plus attributable loss divided by net reference product mass	packaging drawing; scale calibration; issue ledger; supplier declaration
cp_product_release	packaging	conforming reference product	final weighing, inspection, and release records	product type; part number; drawing revision; compatible machine; function; serial or lot; net mass; performance class; calibration status; release disposition	weigh product without packaging and retain final conformity evidence	kg	each released lot or item	same reference period as all input records	reporting manufacturer	sum released conforming net mass and normalize the linked inventory to exactly 1 kg	calibrated scale record; inspection report; calibration or verification certificate where applicable; release authorization

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	all inventory rows	normalized amount = attributable exchange amount / released conforming net product mass	exchange amount; released conforming net product mass	exchange per 1 kg reference product
calc_electricity_conversion	electricity rows	electricity (MJ) = measured electricity (kWh) x 3.6	electricity meter reading in kWh	electricity in MJ
calc_material_reconciliation	purchased materials and components	consumed mass = opening stock + receipts - closing stock - documented returns or transfers out	stock and transaction records by material identity	consumed material mass
calc_waste_reconciliation	scrap and wastewater	exported waste = opening waste stock + generated or collected waste - closing waste stock - documented internal reuse	waste stock, dispatch, meter, and reuse records	exported waste mass

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Retain part number or drawing revision, function, compatible machine, product configuration, net mass, and release status.	BOM, drawing, product specification, calibrated scale record, inspection release
dq_temporal_alignment	all foreground exchanges	Inputs, outputs, stock corrections, rejects, rework, and released product shall cover the same representative period; justify how the chosen period captures normal product and operating variation.	dated ledgers, meter records, production report, campaign rationale
dq_bom_completeness	purchased materials and components	Reconcile all purchased input mass to named atomic flows or explicitly document every residual mass by concrete substance or component and resolve its UUID before publication.	mass-based BOM reconciliation and unresolved-flow log
dq_meter_quality	electricity, water, wastewater, and product mass	Document meter or scale identity, calibration status, reading interval, missing-data treatment, and allocation method.	calibration record, meter log, estimation worksheet
dq_calibration_traceability	force-application, force-measuring, and extensometer accessories	Where the product claim depends on calibration or verification, retain the applicable procedure, equipment identity, result, uncertainty or class, and certificate traceability.	calibration or verification record; iso-7500-1-2018; iso-9513-2012
dq_upstream_representativeness	linked upstream datasets	Match material state, geography, technology, recycled content, electricity mix, water supply, and waste destination; disclose every proxy.	dataset metadata and proxy justification

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_category_scope	product identity	The output shall be a separately supplied part or accessory specifically or principally for a CPC 48262 mechanical-properties testing machine; a complete machine or unrelated instrument part fails category conformance.	un-cpc-3-0-structure-2025; un-cpc-3-0-explanatory-notes-2025
validate_reference_flow	functional unit and reference flow	Confirm exactly 1 kg net conforming product without packaging and all required qualifiers, including product function, interface, configuration, manufacturing route, and calibration status where applicable.
validate_inventory_atomicity	process inventory	Every exchange shall be a concrete atomic flow with one direction, one flow type, one property, one unit, and one applicability condition; no utility, material, packaging, waste, or emission umbrella row is allowed.
validate_inventory_reconciliation	inputs, outputs, rework, and stock	Reconcile purchase, stock, BOM, meter, reject, rework, waste, and release records over the same period; investigate and disclose every unexplained material-balance gap.
validate_uuid_status	Tiangong references	Use only directly audited public state_code=100 UUIDs with matching semantics, classification, product state, flow type, property, and unit group. Keep the reference-product and polyethylene-film UUID fields unresolved until exact candidates are audited.
validate_calibration_claim	calibrated or verified accessories	A force-application accessory, force-measuring assembly, or extensometer carrying a calibration or performance claim shall retain applicable inspection, calibration or verification evidence and shall identify the static or dynamic application boundary.	iso-7500-1-2018; iso-9513-2012
validate_boundary_and_allocation	dataset model	Confirm all foreground and outsourced operations, upstream links, waste destinations, exclusions, cut-offs, proxies, and shared-process allocation drivers are disclosed and consistently applied.

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset after methodology and UUID review; this candidate PCR does not itself publish a dataset
downstream_use	Cradle-to-gate process datasets and lifecyclemodel components for a declared separately supplied mechanical-properties testing-machine part or accessory
allowed_use	Product-footprint and equipment-system studies when the product function, compatible-machine interface, material composition, manufacturing route, calibration status, geography, time, and packaging are representative
excluded_use	Comparison across different accessory functions or performance classes; complete-machine datasets; unqualified global averages; use-phase or end-of-life claims without added scenario data
required_metadata	canonical PCR id; product type; part number or drawing revision; compatible machine; function; net mass; BOM coverage; manufacturing and finishing routes; calibration or verification status; geography; reference period; packaging; allocation; cut-offs; data sources; UUID resolution status
required_quality_disclosure	temporal and geographic representativeness; primary-data share; meter and scale quality; BOM mass coverage; material-balance result; outsourced operations; proxies; uncertainty; unresolved UUIDs or range-evidence needs
update_trigger	material design or supplier change; manufacturing-route or site change; calibration-standard revision affecting claims; electricity or waste-treatment change; more representative foreground data; resolution of the reference-product or polyethylene-film UUID; new independent range evidence

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, updated 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-07)	Official product classification identity and hierarchy for CPC 48262 and 48285
un-cpc-3-0-explanatory-notes-2025	official_guidance	United Nations Statistics Division, CPC Version 3.0 Explanatory Notes, updated 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf (retrieved 2026-09-07)	Original-text verification of the distinct complete-machine and separately supplied parts-and-accessories boundaries
iso-7500-1-2018	standard	ISO 7500-1:2018, Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system, official ISO abstract and status page, https://committee.iso.org/standard/72572.html?browse=tc (retrieved 2026-09-07)	General inspection including force-application accessories, force-measuring-system calibration, performance-class verification, and static-application limitation
iso-9513-2012	standard	ISO 9513:2012, Metallic materials - Calibration of extensometer systems used in uniaxial testing, official ISO abstract and status page, https://committee.iso.org/standard/41619.html?browse=tc (retrieved 2026-09-07)	Extensometer-system identity and static calibration scope for contacting and non-contacting systems