Gauze (other than narrow fabrics) · 8. Foreground Data Collection, Calculation, and Quality Rules

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_yarn_preparation	yarn_preparation	yarn, electricity, prepared beam and yarn waste	weigh tickets, ERP issues, submeters and waste logs	yarn lot; fibre composition; gross/tare/net mass; conditioning basis; kWh; prepared-beam mass; waste mass	Calibrated scales, supplier/ERP reconciliation, submeter or documented main-meter allocation	kg; kWh	each lot and monthly meter close	At least 12 representative months or the complete shorter campaign	All winding, warping and beaming equipment serving the declared output	Sum matched records and normalize by conditioned prepared output and final reference mass	Scale and meter calibration; lot genealogy; invoice/ERP reconciliation; missing-record log
cp_warp_sizing	warp_sizing	warp, each size constituent, water, electricity, steam, sized beam and wastewater	batch recipe, chemical issue, concentration, meters, mass and tank records	warp mass; each chemical mass and concentration; water; kWh; steam; sized mass; effluent volume	Recipe-to-issue reconciliation with calibrated meters and scales	kg; m3; kWh	each sizing batch and monthly meter close	Same period as sized warp used in declared gauze	All applicable sizing ranges	Calculate active constituent mass separately; sum utilities; normalize by sized warp and reference output	Recipe approval; concentration certificate; meter calibration; mass-balance review
cp_gauze_weaving	gauze_weaving	warp, weft, loom utilities, greige gauze, waste, wastewater and dust	loom production log, yarn issue, submeter, flow meter, waste scale and air test	loom type; warp/weft mass; kWh; Nm3 air; m3 water; greige mass; waste; exhaust concentration and volume	Lot-level loom records with route-specific meters or documented equipment allocation	kg; kWh; Nm3; m3	each lot; utilities at least shift or monthly	Representative campaign covering declared loom routes	All looms producing the declared gauze	Preserve route totals; normalize by conditioned greige output	Loom genealogy; calibration; downtime record; waste reconciliation; laboratory report
cp_desizing_scouring	desizing_scouring	greige input, each chemical and enzyme preparation, water, steam, electricity, prepared gauze and wastewater	batch sheet, issue records, formulation concentration or enzyme activity, meters, mass and effluent logs	textile dry mass; each chemical or enzyme-preparation mass; concentration or activity; water; steam; kWh; output dry mass; wastewater	Batch reconciliation and calibrated line meters	kg; m3; kWh	each batch and monthly close	Same wet-preparation campaigns as declared output	All desizing/scouring lines in scope	Keep each chemical or enzyme preparation atomic; sum utilities; normalize by dry prepared gauze	Recipe version; formulation certificate or enzyme-activity evidence; meter calibration; inlet/output dry-mass test; effluent reconciliation
cp_peroxide_bleaching	peroxide_bleaching	prepared input, peroxide, alkali, acid, water, steam, electricity, bleached gauze and wastewater	batch sheet, chemical issues, meters, whiteness and mass tests	input/output dry mass; active H2O2, NaOH and acetic acid; water; steam; kWh; wastewater	Batch-level chemical and utility reconciliation	kg; m3; kWh	each bleach batch and monthly close	Same bleach campaigns as declared output	All peroxide-bleaching lines in scope	Keep chemicals atomic; normalize by dry bleached gauze	Recipe and concentration evidence; calibration; whiteness test; wastewater log
cp_reactive_dyeing	reactive_piece_dyeing	textile, each dye/auxiliary, water, steam, electricity, dyed gauze and wastewater	colour recipe, issue records, meters, shade and mass tests	Colour Index identity; formulation concentration; each chemical mass; textile dry mass; water; steam; kWh; wastewater	Recipe-to-issue reconciliation and calibrated meters	kg; m3; kWh	each dye lot and monthly close	Same dye campaigns as declared output	Each declared reactive-dyeing line	Never aggregate dyes or auxiliaries into a collection row; normalize by dry dyed gauze	Approved colour recipe; SDS/certificate; shade result; meter calibration; effluent log
cp_drying_finishing	drying_heat_setting	wet textile, electricity, indirect steam, direct gas, dry textile and stack emissions	dryer batch log, moisture tests, electricity, steam and gas meters, and stack reports	wet/dry mass; kWh; steam mass and conditions; gas volume; net calorific value; stack concentrations and gas volume	Matched batch, energy and emissions records	kg; kWh; MJ	each campaign; fuel, steam and electricity monthly; stack per permit	Representative period for each drying technology	Each dryer/stenter route in scope	Preserve indirect-steam, direct-fired and other separately declared heat routes; normalize by dry output	Moisture test; meter calibration; steam balance; fuel invoice; stack method and laboratory accreditation
cp_final_finishing_packaging	inspection_rolling_packaging	inspected gauze, electricity, each packaging material, reference output and wastes	inspection log, scales, packaging issues, meter and waste log	width; length; mass/area; gross/tare/net mass; kWh; core, film and board mass; rejects and scraps	Calibrated product and tare weighing with lot genealogy	kg; cm; m; g/m2; kWh	each saleable roll or batch and monthly reconciliation	Complete declared output period	All inspection, rolling and packaging lines	Sum net product only for reference flow; separately normalize every packaging and waste row	Scale calibration; width and mass/area test; inspection release; packaging bill and waste receipts
cp_thermal_supply	thermal_supply	gas, feedwater, electricity, steam, blowdown and stack emissions	fuel, water, electricity and steam meters; fuel certificate; stack tests	gas volume; NCV; feedwater; condensate return; kWh; steam mass/conditions; blowdown; stack results	Calibrated utility meters and permit-compliant stack measurement	MJ; m3; kWh; kg	continuous or monthly; stack per permit	Same period as consuming processes	Boiler units supplying foreground steam	Calculate fuel energy from measured volume and NCV; normalize by delivered steam and final output	Meter calibration; supplier NCV; steam balance; stack report; blowdown log
cp_wastewater_treatment	wastewater_treatment	inlet wastewater, electricity, each treatment chemical, discharged water, pollutants and sludge	inlet/outlet flow, dosing, laboratory, electricity, sludge and disposal records	m3; each chemical mass/concentration; kWh; pH; BOD; COD; TSS; TN; TP; AOX; sludge wet/dry mass	Composite sampling matched to calibrated flow and dosing records	m3; kg; kWh; mg/L	flow continuous; chemistry at permit frequency; monthly mass balance	Same period as generating wet operations	Entire on-site treatment system and declared outfalls	Concentration x matched volume; keep pollutant rows separate; normalize both per m3 and reference output	Accredited laboratory; chain of custody; flow-meter calibration; permit; sludge receipt; inlet/outlet reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	every inventory row	Normalized amount = period amount attributable to declared route / net kg saleable gauze from the same route and period.	Matched flow record; route allocation; reference_net_mass	amount per 1 kg net saleable gauze	ec-ef-method-2021
calc_active_chemical_mass	chemical solutions and formulations	Active constituent mass = as-used solution mass x certified mass fraction. Preserve carrier water or solvent as separate flow when material.	issue mass; concentration certificate; batch recipe	kg active constituent	ifc-textile-ehs-2007
calc_textile_mass_balance	yarn through final gauze	Conditioned yarn input + retained dry size = conditioned saleable gauze + textile waste + measured inventory change; investigate residual rather than assigning it to product.	conditioned input/output/waste masses; retained size; inventory change	mass-balance residual and yield	ec-ef-method-2021
calc_pollutant_load	each water or air pollutant	Emitted mass = representative measured concentration x matched standardized gas or effluent volume, with unit conversion and non-detect treatment disclosed.	concentration; flow/volume; sampling period	kg pollutant per period and per reference flow	ifc-textile-ehs-2007
calc_thermal_energy	natural gas	Net calorific energy = metered gas volume x supplier net calorific value for the same period; do not substitute a higher heating value without disclosure.	gas volume; NCV	MJ natural-gas input	ec-ef-method-2021
calc_wet_finish_totals	comparable full woven-fabric-finishing route	Sum water, electricity and thermal energy over all applicable preparation, bleaching/dyeing, washing and drying steps before comparing with the official QA guardrails; never apply the aggregate range to each step.	route-specific wet-operation rows and dry finished mass	aggregate L/kg, kWh/kg and MJ/kg	ifc-textile-ehs-2007

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	product and route	Demonstrate gauze warp construction, width greater than 30 cm, fibre composition, finish state, lot genealogy and exact route; reject medical articles, nonwovens and other excluded identities.	Weave specification, width and mass/area test, product specification, lot and classification record; unsd-cpc-3-0-2025; eu-cn-gauze-narrow-fabric-1989
dq_temporal	foreground data	Use at least 12 representative months when continuous production exists; a shorter complete campaign is acceptable only with seasonality, start-up, downtime and representativeness disclosed.	Meter periods, production schedule, downtime and campaign records; ec-ef-method-2021
dq_completeness	material, utility, waste and emission inventory	Reconcile purchase/issue, meters, product and waste. Every actual yarn, size constituent, dye, auxiliary, fuel, packaging component, waste and direct emission is a separate atomic row; zero or not-applicable requires evidence.	Reconciliation workbook, recipes, invoices, meters, waste receipts, laboratory and permit records
dq_route_separation	mutually exclusive routes	Keep greige, prepared, bleached, dyed, loom-technology, direct-fired/indirect-heated and on-site/purchased-steam routes separate through collection and normalization.	Route-coded production and utility records; ifc-textile-ehs-2007
dq_measurement	scales, meters and laboratory results	Use calibrated equipment, matched sampling and traceable methods; retain uncertainty, non-detect treatment and data corrections.	Calibration certificates, chain of custody, accredited laboratory reports; ifc-textile-ehs-2007
dq_secondary_data	upstream datasets	Select geographically, technologically and temporally representative yarn, electricity, fuel, chemical, water, packaging and treatment datasets; document every proxy and its effect.	Dataset metadata, selection record and sensitivity; ec-ef-method-2021

9. Validation Rules

rule_id	applies_to	rule	source_ids
validate_reference_identity	reference product	Confirm gauze/leno warp construction, width greater than 30 cm, net conditioned mass and excluded medical/made-up identities; fail if a broader fabric or medical product UUID is used.	unsd-cpc-3-0-2025; eu-cn-gauze-narrow-fabric-1989
validate_reference_uuid	Tiangong identity	Before publication, require an exact Product flow UUID plus directly verified CPC 26860, English and Chinese baseName, Mass property UUID, unit-group UUID and reference unit from a state_code=100 read; unresolved status fails publication but not candidate authoring.
validate_atomic_inventory	every process inventory	Reject plural selectors or combined carriers. Require one physical or chemical exchange per card and a separate row for every actual dye, auxiliary, fuel, packaging material, waste and elementary emission.
validate_route_gates	conditional processes	Reject averaging of mutually exclusive greige, bleached, dyed, loom, drying and thermal-supply routes; each included process must have an affirmative production record and each excluded route an explicit not-applicable basis.	ifc-textile-ehs-2007; jrc-textiles-bref-2023
validate_mass_balance	textile chain	Reconcile conditioned yarn, retained size, intermediate transfers, saleable gauze, textile wastes and inventory change; investigate and disclose residuals.	ec-ef-method-2021
validate_packaging_tare	reference output	Confirm reference mass excludes core, film, carton, pallet and other packaging while each consumed packaging component remains in inventory.	ec-ef-method-2021
validate_wet_finish_resource_qa	boundary-compatible full woven-fabric-finishing route	Compare aggregate foreground totals, not individual steps, with IFC comparative ranges: electricity 0.5-1.5 kWh/kg, thermal energy 30-70 MJ/kg and water 50-100 L/kg woven fabric finished. These ranges come from limited installations and are QA flags only; explain deviations and never replace measured data.	ifc-textile-ehs-2007
validate_effluent_qa	final on-site freshwater discharge	Compare representative discharge with the more stringent applicable permit or IFC guideline values, including pH 6-9, BOD 30 mg/L, COD 160 mg/L, TSS 50 mg/L, AOX 1 mg/L, total phosphorus 2 mg/L and total nitrogen 10 mg/L; report exceedance and do not convert the threshold into an inventory default.	ifc-textile-ehs-2007
validate_allocation	shared burdens and external outputs	Require the documented hierarchy of subdivision/system expansion, physical causality and economic allocation; reject unexplained allocation and duplicate recycling credits.	ec-ef-method-2021
validate_evidence	final foreground package	Verify coverage, precision, completeness, representativeness, consistency, reproducibility, sources and uncertainty through document review and model validation; retain access to underlying records.	ec-ef-method-2021

10. Published Dataset Profile

Field	Value
dataset_role	Foreground manufacturing dataset for one declared woven gauze product and route at the factory gate
downstream_use	May support secondary_dataset or background_dataset use after methodology, identity, translation and publication review
allowed_use	Route- and product-specific modelling of gauze fabric production when fibre composition, width, finish state, technology, geography, time and allocation are compatible
excluded_use	Medical gauze or bandage articles; nonwovens; narrow fabrics; glass-fibre fabric; coated/laminated fabric; proxying an undisclosed fibre or finish route; comparative assertion from a candidate or unreviewed dataset
required_metadata	Exact reference-flow identity and UUID status; CPC context; fibre composition; weave construction; width; mass per area; moisture basis; finish state; dye/formulation; loom and wet-processing technology; site and geography; period and production coverage; utility and wastewater routes; packaging configuration; allocation; cut-offs; upstream datasets; unresolved gaps
required_quality_disclosure	Primary-data coverage, calibration, sampling, mass balance, route separation, allocation basis, secondary-data representativeness, uncertainty, deviations from QA guardrails, permit compliance and unresolved UUIDs
update_trigger	Change in product identity, width or weave; fibre or formulation; loom or wet-processing route; utility or wastewater technology; site; allocation; reference-flow identity; material data source; or evidence showing current QA rules are no longer representative

11. Data Sources

Source id	Type	Reference	Used for
unsd-cpc-3-0-2025	standard	United Nations Statistics Division, Central Product Classification Version 3.0, structure and explanatory material, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/CPC and https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-08-21)	CPC 26860 category boundary and separation from adjacent textile and made-up-article categories
eu-cn-gauze-narrow-fabric-1989	standard	Council Regulation (EEC) No 2886/89, Combined Nomenclature Chapter 58 notes for headings 5803 and 5806, https://eur-lex.europa.eu/eli/reg/1989/2886/oj/eng (retrieved 2026-08-21)	Gauze warp construction and narrow-fabric width definition used for identity and measurement
jrc-textiles-bref-2023	official_guidance	European Commission Joint Research Centre, Best Available Techniques Reference Document for the Textiles Industry, 2023, https://bureau-industrial-transformation.jrc.ec.europa.eu/index.php/reference/textiles-industry (retrieved 2026-08-21)	Route-gated fibre preparation, pretreatment, enzymatic starch desizing, washing, bleaching, dyeing and finishing operations; water, chemical, energy, wastewater and emission relevance
ifc-textile-ehs-2007	official_guidance	World Bank Group/IFC, Environmental, Health, and Safety Guidelines for Textile Manufacturing, 30 April 2007, Annex A and pp. 2-14, https://www.ifc.org/content/dam/ifc/doc/2000/2007-textiles-manufacturing-ehs-guidelines-en.pdf (retrieved 2026-08-21)	Winding, warping, beaming, sizing, weaving and finishing unit operations; atomic inputs and releases; monitoring; official comparative woven-fabric-finishing and dewatered-sludge ranges; effluent guideline values including TSS
ec-ef-method-2021	official_guidance	European Commission Recommendation (EU) 2021/2279, Annex I Product Environmental Footprint Method, sections 3.2, 4.5, 4.6 and 8, https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX%3A02021H2279-20211230 (retrieved 2026-08-21)	Functional unit and reference flow, system boundary, company-specific data, allocation hierarchy, data quality, reporting and verification/validation