Instruments for measuring length, for use in the hand (including measuring rods and tapes, micrometers and callipers) n.e.c.

1. Scope and Applicability

This PCR covers cradle-to-factory-gate production of portable instruments whose primary function is direct hand-use measurement of length, including material measures such as rods and tapes, external or internal micrometers, and callipers not elsewhere classified. It covers analogue, mechanical-digital, and electronic-digital variants when length measurement remains the primary function.

The PCR excludes gauge blocks and other reference standards, fixed or coordinate measuring machines, geodetic or surveying instruments, non-contact electronic distance meters, instruments whose primary measurand is not length, separately supplied parts and accessories, distribution, use, repair, and end-of-life. A data package may extend the boundary, but shall disclose and separately inventory the extension.

The product is a tested and, where claimed, calibrated instrument packaged for dispatch at the manufacturer's factory gate. The declared instrument family, construction, indication type, measuring range, scale interval or resolution, accuracy class or maximum permissible error, net mass, packaging, and conformity basis distinguish concrete products within this category.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.medical-appliances-precision-and-optical-instruments-watches-and-clocks.instruments-for-measuring-length-for-use-in-the-hand-including-measuring-rods-and-tapes-b639b90a
classification_refs	CPC 3.0: 48233
covered_products	Hand-use measuring rods and tapes; callipers; internal, external, and depth micrometers; analogous portable direct-contact length instruments n.e.c.
excluded_products	Gauge blocks and reference standards; fixed, coordinate, geodetic, surveying, and non-contact distance-measuring systems; non-length instruments; separately supplied parts and accessories
representative_product	A packaged, conforming hand-held calliper, micrometer, measuring rod, or measuring tape with declared metrological characteristics
production_route	Receipt of semi-finished metals or polymers; precision forming, machining or moulding; conditional scale marking and surface finishing; assembly; metrological verification or calibration; packaging
market_state	Finished, verified, packaged instrument at the manufacturing factory gate

3. Reference Flow

Field	Value
What	Manufacture and provision at factory gate of a hand-held instrument whose primary function is measuring length
How much	1 kg net mass of conforming finished instrument, excluding packaging
How well	Declared instrument family, indication type, measuring range, scale interval or resolution, accuracy class or maximum permissible error, construction, and conformity basis
How long or cycle	One completed factory-gate production batch; expected service life is disclosed but is not the normalization basis
reference_flow_link	hand_held_length_instrument_output

Field	Value
Reference amount	1 kg net conforming instrument output
Reference product flow	Hand-held length measuring instrument
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	instrument family and model; analogue, dial, mechanical-digital or electronic-digital indication; measuring range; scale interval or resolution; accuracy class or maximum permissible error; principal materials, grades and recycled content; surface finish; net instrument mass; packaging specification; factory geography; production period; electricity supply mix; verification or calibration procedure and traceability; expected service life

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.

The reference-product UUID is intentionally unresolved: the bounded hybrid search returned no exact public state-100 hand-held length-instrument product flow.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_net_mass	Reference product and all normalized inventory rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Determine net mass from conforming finished instruments after final verification and before packaging. Exclude packaging, rejected units, fixtures, and calibration artefacts. Normalize batch exchanges by total conforming net instrument mass.
electricity_energy	Purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve meter readings and allocation basis. Convert kWh to MJ using exactly 3.6 MJ per kWh; do not mix site generation, purchased electricity, and exported electricity.
water_mass_conversion	Process water and cleaning wastewater	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Prefer direct mass measurement. When volume is measured, retain volume, temperature, and the stated density source used for conversion; do not silently assume density.
material_and_waste_mass	Material inputs and segregated wastes	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record as-received input mass and as-dispatched waste mass by declared composition and state. Do not net scrap value, recycling credit, moisture, or attached fluid from the physical mass record.

5. System Boundary

The foreground starts when semi-finished materials, components, process fluids, packaging, and purchased energy cross the manufacturing-site boundary. It ends with a conforming, packaged instrument ready for dispatch. Upstream production of those inputs and downstream treatment of wastes are represented by linked datasets, not recreated as foreground operations.

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased semi-finished metals, polymer feedstocks or composite strip, process consumables, packaging components, and energy received at the instrument manufacturing site
starting_condition_role	Foreground gate for component fabrication, marking, assembly, metrological verification or calibration, and packaging
product_classification_scope	Portable hand-use instruments whose primary function is measuring length within the semantic boundary of this PCR
recursive_input_rule	A same-category instrument purchased as an input is recorded once as a product input with its own upstream dataset; its manufacture is not recursively expanded in this foreground
upstream_dataset_requirement	Every purchased material, consumable, energy carrier, packaging component, and externally treated waste shall link to a geographically and technologically representative upstream or treatment dataset
disclosure	Declare included sites, outsourced operations, cut-offs, instrument family and construction, process allocation, packaging, production period, electricity mix, waste destinations, and any extension beyond factory gate

rule_id	applies_to	rule	source_ids
boundary_required_operations	cradle_to_factory_gate_foreground	Include precision forming, machining or moulding actually used; scale marking and finishing actually used; assembly; final inspection; metrological verification or calibration supporting the market claim; and packaging.	oiml-r35-1-2007-amd-2014; iso-13385-1-2019; iso-3611-2023
boundary_variant_applicability	route_conditioned_operations	Apply each material, process fluid, marking, and waste row only when its declared route condition is met. Do not model all instrument families or material constructions simultaneously.
boundary_upstream_links	purchased_inputs_and_waste_treatment	Link upstream production for every purchased input and treatment for every exported waste. Keep supplier transport outside this PCR unless the study explicitly extends the boundary and reports it separately.
boundary_exclusions	default_exclusions	Exclude capital equipment, buildings, employee travel, distribution, use, maintenance, repair, and end-of-life by default; disclose any material study-specific inclusion.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
precision_component_fabrication	Precision component fabrication	required	Always include; apply individual material and fluid rows only to the declared product construction and fabrication route.	Foreground forming, machining, moulding, aqueous cleaning, and segregation of fabrication wastes	Net kg of conforming finished instrument attributable to the batch
scale_marking_and_finishing	Scale marking and finishing	conditional	Include when graduations, legends, coatings, plating, or other surface treatment occur at the reporting site.	Foreground marking and finish operations	Net kg of conforming finished instrument receiving the operation
assembly_verification_packaging	Assembly, metrological verification, and packaging	required	Always include assembly, final inspection, and packaging; include calibration activity when calibration is performed or claimed.	Foreground final assembly, verification or calibration, and packing	1 kg net conforming instrument output

Process: Precision component fabrication (precision_component_fabrication)

Inputs

Product flows

Stainless steel sheet feedstock (stainless_steel_sheet_input)

Record stainless steel sheet entering fabrication only for instruments with stainless sheet components; declare alloy grade, thickness, recycled content, supplier, and as-received state.

• Selected flow: Stainless steel sheet
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production batch, adjusted for documented returns to stock
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Aluminium sheet feedstock (aluminium_sheet_input)

Record aluminium sheet entering fabrication only for products containing sheet aluminium; declare alloy, temper, thickness, recycled content, supplier, and surface state.

• Selected flow: aluminium sheet 4f197be4-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production batch, adjusted for documented returns to stock
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

ABS copolymer granulate (abs_granulate_input)

Record moulding feedstock only for products with ABS components; declare grade, colour, additive package, recycled content, supplier, and moisture-conditioning basis.

• Selected flow: Acrylonitrile-butadiene-styrene (ABS) copolymer, granulate 8f1317c1-aa51-4524-8692-74079c923e2c
• Flow property / unit: Mass / kg
• Amount rule: measured dry feed mass issued to the production batch, adjusted for documented returns to stock
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Glass fibre reinforced polymer feedstock (gfrp_input)

Record composite feedstock only for applicable measuring-tape or rod constructions; declare resin system, fibre fraction, strip dimensions, coating, and supplier.

• Selected flow: glass fibre reinforced polymer dab98d11-c76c-4d40-bac9-a3d082f1fb36
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production batch, adjusted for documented returns to stock
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Fabrication electricity (fabrication_electricity_input)

Record purchased electricity used by forming, machining, moulding, cleaning, and directly supporting fabrication equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: sub-metered electricity, or documented facility electricity allocated to fabrication by equipment runtime and rated or measured demand
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_electricity

Aqueous cleaning process water (process_water_input)

Record process water only when aqueous cleaning or rinsing occurs in fabrication.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered water delivered to fabrication cleaning and rinsing, net of separately metered recirculation
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_water

Cutting fluid (cutting_fluid_input)

Record cutting fluid only for machining routes; declare formulation, concentration, make-up water treatment, reuse, and inventory-change basis.

• Selected flow: Cutting Fluid 576d250f-4f36-4385-939d-0f03b8f95a10
• Flow property / unit: Mass / kg
• Amount rule: purchases plus opening inventory minus closing inventory and documented off-site returns for the batch period
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_process_fluids

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Segregated stainless steel machining scrap (stainless_steel_scrap_output)

Record clean stainless steel offcuts and swarf only when separately segregated; declare alloy, attached-fluid state, and destination.

• Selected flow: Stainless steel machining scrap
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred from the process to storage, recycler, or treatment, without avoided-burden credit
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Segregated aluminium machining scrap (aluminium_scrap_output)

Record aluminium offcuts and swarf only when separately segregated; declare alloy, attached-fluid state, and destination.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred from the process to storage, recycler, or treatment, without avoided-burden credit
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Segregated ABS moulding scrap (abs_moulding_scrap_output)

Record runners, purges, and rejected mouldings only when their ABS-only composition and destination are known.

• Selected flow: ABS moulding scrap
• Flow property / unit: Mass / kg
• Amount rule: measured segregated ABS waste mass leaving controlled internal regrind loops
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Waste cutting oil (waste_cutting_oil_output)

Record this flow only for oil-based cutting routes; water-miscible spent fluid shall not be assigned this identity.

• Selected flow: Waste cutting oil 80d926e3-0f76-4a19-9b1e-ffec9deb1216
• Flow property / unit: Mass / kg
• Amount rule: measured shipment mass plus closing stored waste minus opening stored waste for the reporting period
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Wastewater from cleaning (cleaning_wastewater_output)

Record aqueous cleaning wastewater transferred to on-site or off-site treatment; keep any direct elementary discharge as a separately speciated flow.

• Selected flow: Wastewater from cleaning f0402393-e82c-47e8-9cd8-a486c97f3e89
• Flow property / unit: Mass / kg
• Amount rule: measured wastewater mass, or measured volume converted using recorded temperature and density basis
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Elementary flows

Process: Scale marking and finishing (scale_marking_and_finishing)

Inputs

Product flows

Water-based marking ink (water_based_marking_ink_input)

Record one declared water-based ink formulation only when used to print or fill graduations or legends; other inks or coatings require their own atomic flow identities.

• Selected flow: Water-based marking ink
• Flow property / unit: Mass / kg
• Amount rule: issue mass minus documented unused return for the marked production batch
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net conforming finished instrument output receiving this marking route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_marking_materials

Marking and finishing electricity (marking_electricity_input)

Record purchased electricity used by printing, engraving, laser marking, curing, or finishing equipment actually operated.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: sub-metered electricity, or documented allocation by equipment runtime and rated or measured demand
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output receiving this process
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_marking_electricity

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Process: Assembly, metrological verification, and packaging (assembly_verification_packaging)

Inputs

Product flows

Assembly lubricating oil (lubricating_oil_input)

Record lubricating oil applied to sliding, screw, hinge, or retraction mechanisms; declare grade and application.

• Selected flow: lubricating oil aec6f1a5-7b09-4704-870d-434d3ada0edd
• Flow property / unit: Mass / kg
• Amount rule: issue mass minus documented unused return for the assembled production batch
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_materials

Corrugated board box (corrugated_box_input)

Record the mass of corrugated board boxes supplied with the reference product; declare dimensions, board grade, recycled content, and units per shipment.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: packaging bill-of-material mass reconciled to boxes consumed for conforming shipped units
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_materials

Polyethylene protective film (polyethylene_film_input)

Record polyethylene film only when supplied with the product as protective wrapping; declare polymer grade, thickness, recycled content, and mass.

• Selected flow: Polyethylene packaging film
• Flow property / unit: Mass / kg
• Amount rule: packaging bill-of-material mass reconciled to film consumed for conforming shipped units
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_materials

Assembly, verification, and packaging electricity (assembly_electricity_input)

Record purchased electricity used by assembly tools, electronic configuration, verification or calibration equipment, and packaging equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: sub-metered electricity, or documented allocation by equipment runtime and rated or measured demand
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_electricity

Waste flows

Elementary flows

Outputs

Product flows

Conforming hand-held length measuring instrument (hand_held_length_instrument_output)

Record only units that pass the declared final inspection and metrological verification or calibration criteria. Packaging mass is excluded from this product flow.

• Selected flow: Hand-held length measuring instrument
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of all conforming finished instruments in the reporting batch
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finished_product
• Sources: un-cpc-3-0-structure-2025; oiml-r35-1-2007-amd-2014; iso-13385-1-2019; iso-3611-2023

Waste flows

Used lubricating oil (used_lubricating_oil_output)

Record lubricating oil removed from assembly or verification equipment and sent for treatment; do not combine it with cutting fluid.

• Selected flow: Used lubricating oil 55d93375-7f04-4166-b2a2-88ce929051a5
• Flow property / unit: Mass / kg
• Amount rule: measured shipment mass plus closing stored waste minus opening stored waste for the reporting period
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net conforming finished instrument output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_wastes

Elementary flows

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
allocation_subdivision_first	shared_foreground_operations	Subdivide and meter instrument families, batches, and operations whenever technically feasible. Use allocation only for genuinely shared exchanges that cannot be separately measured.
allocation_physical_mass	residual_shared_exchanges	Allocate residual shared material, energy, water, and waste exchanges by conforming net instrument mass. If mass does not represent the causal driver, document and use a measured driver such as equipment runtime, cycle count, or occupied process time.
allocation_scrap_no_credit	exported_scrap_and_waste	Report each exported waste at its measured mass and destination. Do not subtract revenue or avoided virgin production from foreground exchanges; any recycling substitution or end-of-life credit belongs in a separately disclosed downstream model.
allocation_rejects	rejected_instruments_and_rework	Assign rework exchanges to the recovered conforming output and assign discarded rejects to the production batch that generated them. Disclose reject and rework masses; do not count rejected units as reference product.

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	precision_component_fabrication	Product-specific fabrication material	supplier receipt and batch issue/return record	material identity; grade; supplier; lot; opening mass; issued mass; returned mass; closing mass; batch id	Calibrated scale records reconciled to stores ledger and bill of materials	kg	Each issue and return; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site and declared product family	Sum net issued mass by atomic material and batch; divide by conforming net product mass	Scale identifier and calibration status; supplier certificate; lot trace; reconciliation variance
cp_fabrication_electricity	precision_component_fabrication	Fabrication electricity	meter and equipment allocation record	meter id; opening and closing reading; kWh; equipment runtime; demand; batch id	Dedicated meter preferred; otherwise documented runtime-demand allocation from facility meter	kWh and MJ	Continuous or each batch; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site	Convert kWh to MJ and divide electricity attributable to fabrication by conforming net product mass	Meter calibration or verification; allocation worksheet; facility-bill reconciliation
cp_fabrication_water	precision_component_fabrication	Process water	water meter or batch charge record	source; meter id; volume or mass; temperature; density source; recirculated quantity; batch id	Dedicated meter, tank mass, or validated batch-volume record	kg, with source volume retained	Each batch or daily; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site	Convert volume only with recorded density basis; exclude separately metered recirculation; divide by conforming net product mass	Meter check; density basis; water balance
cp_fabrication_process_fluids	precision_component_fabrication	Cutting fluid	purchase, make-up, return, and inventory record	formulation; concentration; purchase mass; opening stock; closing stock; returned mass; batch id	Stores mass balance supported by measured additions	kg	Each addition and inventory close; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site and machining technology	Purchases plus opening stock minus closing stock and returns; divide by conforming net product mass	Formulation record; inventory reconciliation; scale evidence
cp_fabrication_wastes	precision_component_fabrication	Segregated fabrication waste	waste scale ticket, container log, and storage inventory	waste identity; composition; container id; gross mass; tare; opening stock; closing stock; destination; batch link	Weigh each segregated waste transfer and reconcile storage change	kg	Each transfer; aggregate monthly	Same period as production denominator	Each reporting site	Shipments plus closing stock minus opening stock, allocated to causal batch; divide by conforming net product mass	Scale ticket; tare record; waste manifest; segregation audit
cp_marking_materials	scale_marking_and_finishing	Marking material	stores issue and return record	formulation; supplier; lot; issued mass; returned mass; batch id; marked product mass	Calibrated scale or supplier-container mass difference reconciled to stores	kg	Each marked batch	Complete included marking campaigns within reporting period	Each reporting site and marking technology	Net issue mass divided by conforming net product mass receiving the operation	Formulation sheet; lot trace; scale evidence
cp_marking_electricity	scale_marking_and_finishing	Marking and finishing electricity	meter and equipment allocation record	meter id; kWh; runtime; demand; batch id; operation	Dedicated meter preferred; otherwise documented runtime-demand allocation	kWh and MJ	Continuous or each batch; aggregate monthly	Complete included marking campaigns within reporting period	Each reporting site and marking technology	Convert kWh to MJ and divide by conforming net product mass receiving the operation	Meter check; runtime log; allocation worksheet
cp_assembly_materials	assembly_verification_packaging	Assembly lubricant and packaging component	supplier and batch issue record	atomic material identity; supplier; lot; issued mass; returned mass; packaging units; batch id	Calibrated scale and packaging bill-of-material reconciliation	kg	Each batch; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site and declared product family	Net consumed mass by atomic material divided by conforming net product mass	Supplier record; bill of materials; scale calibration status
cp_assembly_electricity	assembly_verification_packaging	Assembly, verification, and packaging electricity	meter and equipment allocation record	meter id; kWh; runtime; demand; operation; batch id	Dedicated meter preferred; otherwise documented runtime-demand allocation	kWh and MJ	Continuous or each batch; aggregate monthly	At least 12 consecutive representative months or complete shorter campaign	Each reporting site	Convert kWh to MJ and divide by conforming net product mass	Meter check; runtime log; allocation worksheet
cp_assembly_wastes	assembly_verification_packaging	Used lubricating oil	waste shipment and inventory record	waste identity; gross mass; tare; opening stock; closing stock; destination; period	Weighed transfer reconciled with stored waste	kg	Each transfer; aggregate monthly	Same period as production denominator	Each reporting site	Shipments plus closing stock minus opening stock; divide by conforming net product mass	Scale ticket; waste manifest; inventory reconciliation
cp_finished_product	assembly_verification_packaging	Conforming reference product	production, inspection, and net-mass record	model; batch id; unit count; unit net mass; conforming mass; rejected mass; rework mass; measuring range; resolution; accuracy criterion; calibration status	Calibrated balance plus signed final inspection and metrological verification or calibration record	kg	Every batch	Complete reporting period	Each reporting site and declared product family	Sum conforming net mass only; exclude packaging and rejected mass	Balance calibration; inspection results; calibration or verification certificate and uncertainty statement where applicable

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_net_material_input	Each purchased material and consumable	net input = purchases or issues + opening stock - closing stock - documented returns	Purchase or issue mass; opening stock; closing stock; returns; batch linkage	Net kg input per reporting period and per kg reference flow
calc_normalized_exchange	Every inventory exchange	normalized exchange = exchange attributable to conforming production / conforming net instrument mass	Atomic exchange record; allocation driver where needed; conforming net instrument mass	kg or MJ exchange per 1 kg reference flow
calc_electricity_conversion	All electricity rows	MJ = metered kWh × 3.6; retain original kWh and meter boundary	Metered or allocated kWh	MJ electricity per 1 kg reference flow
calc_waste_inventory_change	Stored waste outputs	generated waste = dispatched mass + closing stored mass - opening stored mass - documented incoming third-party waste	Scale tickets; opening and closing inventory; third-party receipts	kg generated waste per 1 kg reference flow
calc_uncertainty_report	Metrological verification or calibration result	Identify input quantities, evaluate standard uncertainties, combine them through the declared measurement model, and state expanded uncertainty with coverage factor and coverage probability.	Calibration standard certificate; repeat observations; resolution; environmental conditions; measurement model	Traceable uncertainty statement linked to the batch or model	jcgm-100-2008

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	Reference product	Preserve model, family, indication type, measuring range, scale interval or resolution, accuracy or maximum permissible error, material construction, net mass, and packaging identity.	Product specification, bill of materials, inspection record, and un-cpc-3-0-structure-2025; use oiml-r35-1-2007-amd-2014, iso-13385-1-2019, or iso-3611-2023 as applicable
dq_temporal_coverage	All foreground exchanges	Use at least 12 consecutive representative months unless production is a shorter campaign; explain shutdowns, abnormal lots, missing intervals, and extrapolation.	Dated meters, ledgers, production logs, and coverage calculation
dq_mass_reconciliation	Material and waste mass	Reconcile material issues, conforming product, returned stock, work in progress, rejects, and segregated wastes by declared material. Investigate and disclose material unexplained differences.	Signed mass-balance worksheet and calibrated-scale records
dq_energy_reconciliation	Electricity	Reconcile sub-metered and allocated electricity with the facility meter or invoice for the same time and site boundary.	Meter hierarchy, invoice, runtime records, and reconciliation result
dq_metrological_traceability	Verification and calibration	Identify reference standards, calibration status, environmental conditions, measurement points, acceptance criterion, result, and measurement uncertainty when calibration is claimed.	Traceability chain, calibration or verification record, uncertainty budget following jcgm-100-2008
dq_completeness	Inventory	Confirm applicability of every row and document omitted materials, surface treatments, coatings, electronics, batteries, packaging components, wastes, and direct elementary emissions. Add each applicable omitted exchange as one atomic row.	Applicability checklist, bill of materials, process walk-through, waste register, and permit review

9. Validation Rules

rule_id	applies_to	rule	source_ids
validate_identity_and_qualifiers	reference_product	Reject a data package missing instrument family, model, indication type, measuring range, scale interval or resolution, accuracy or maximum permissible error, net mass, construction, factory geography, production period, or conformity basis.	un-cpc-3-0-structure-2025; oiml-r35-1-2007-amd-2014; iso-13385-1-2019; iso-3611-2023
validate_reference_mass	normalization	Confirm that the denominator is conforming net instrument mass, excludes packaging and rejects, and equals the sum of batch-level conforming product records after allocation.
validate_boundary_and_routes	process_coverage	Confirm inclusion of all applicable fabrication, marking or finishing, assembly, verification or calibration, and packaging operations; confirm that conditional material and waste rows are activated only for the declared route.
validate_atomic_inventory	inventory_rows	Confirm that each exchange is one physical, chemical, waste, or energy flow with direction, flow type, property, unit, amount rule, protocol, and route condition. Reject umbrella or combined exchanges.
validate_uuid_semantics	tiangong_references	For every populated UUID, confirm public state 100, exact baseName, flow type, classification, product state, property, unit group, and route suitability. Keep unresolved UUID cells blank rather than substituting proxies.
validate_reconciliation	foreground_records	Reconcile mass, electricity, water, production, reject, and waste records to the same site and period; disclose coverage, allocation, inventory changes, and unexplained differences.
validate_metrological_evidence	final_verification_or_calibration	Confirm that claimed calibration or conformity is supported by model-specific results, traceability, environmental conditions, acceptance criteria, and a stated uncertainty method where applicable.	oiml-r35-1-2007-amd-2014; iso-13385-1-2019; iso-3611-2023; jcgm-100-2008

10. Published Dataset Profile

Field	Value
dataset_role	Foreground cradle-to-factory-gate production dataset for a declared hand-held length-measuring instrument family and manufacturing route
downstream_use	secondary_dataset; background_dataset
allowed_use	Product carbon footprint, comparative screening, supply-chain modelling, and lifecyclemodel construction when instrument function, route, geography, period, and boundary are compatible
excluded_use	Unqualified comparison across different instrument families, measuring ranges, accuracy levels, service lives, construction routes, or system boundaries; representation of use, maintenance, distribution, or end-of-life without explicit extension
required_metadata	PCR id and version; instrument family and model; indication type; measuring range; scale interval or resolution; accuracy or maximum permissible error; principal materials and recycled content; net mass; packaging; factory geography; production period; electricity mix; process route; verification or calibration basis; expected service life; allocation; cut-offs; source and protocol ids
required_quality_disclosure	Temporal and site coverage; foreground versus upstream status; meter and scale calibration; material, energy, water, and waste reconciliation; sampling and allocation; uncertainty and traceability for claimed calibration; unresolved UUIDs or range evidence; exclusions and data gaps
update_trigger	Material change to model construction, supplier mix, recycled content, fabrication or marking technology, electronics, packaging, electricity mix, site, allocation, calibration or verification basis, waste treatment, or a change exceeding the producer's documented significance threshold

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 2026-09-07)	Official CPC 48233 classification identity and covered-product wording
oiml-r35-1-2007-amd-2014	standard	OIML R 35-1:2007, Material measures of length for general use, Part 1: Metrological and technical requirements, including Amendment 2014, https://www.oiml.org/en/files/pdf_r/r035-1-e07.pdf (retrieved 2026-09-07)	Material-measure scope; nominal length, scale interval, indication, reference conditions, and accuracy-class qualifiers
iso-13385-1-2019	standard	ISO 13385-1:2019, Geometrical product specifications — Dimensional measuring equipment — Part 1: Design and metrological characteristics of callipers, https://committee.iso.org/standard/71149.html?browse=tc (retrieved 2026-09-07)	Calliper analogue, dial, and digital variants and required design or metrological-characteristic disclosure
iso-3611-2023	standard	ISO 3611:2023, Geometrical product specifications — Dimensional measuring equipment — Design and metrological characteristics of micrometers for external measurements, https://committee.iso.org/standard/77951.html?browse=tc (retrieved 2026-09-07)	External micrometer analogue, mechanical-digital, and electronic-digital variants and required metrological-characteristic disclosure
jcgm-100-2008	method_factor	JCGM 100:2008, Evaluation of measurement data — Guide to the expression of uncertainty in measurement, https://doi.org/10.59161/JCGM100-2008E (retrieved 2026-09-07)	Evaluation and reporting of uncertainty for product verification or calibration evidence