Dual-sealed air-filled double insulating glass units with hot-melt butyl secondary seal · 7. Allocation and Co-product Handling

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocate_direct	all exchanges	Apply only in attributional cases requiring allocation. First use dedicated measurements and actual/virtual subdivision, assigning embodied articles and directly attributable tests, failures and service to the relevant release cohort. Keep gross physical outputs independent from burden shares.	ilcd-attributional-2010
allocate_causal	remaining shared exchanges	For each remaining exchange demonstrate the determining physical causal relationship specific to that exchange and function. Metered heater time/load, washing cycles or actual heated sealant demand may be investigated, but neither mass nor area nor energy nor a convenient shared fraction is automatically causal. Retain evidence and sensitivity separately for each exchange.	ilcd-attributional-2010
allocate_residual	genuine unassignable residual	Only for genuinely remaining inseparable multifunctional burdens use documented contemporaneous market values for actual coproducts in their actual state at the same common process gate. Separate quantity, actual price, currency/date, moisture/quality and gate, then disclose shares and sensitivity. No arbitrary physical/economic choice, fixed percentage, universal price or default avoided-burden credit. A waste sale, internal reuse or return does not automatically create a coproduct.	ilcd-attributional-2010
allocate_returns	FG and packaging	Retain original release and delivery IDs. Reverse the original delivery/burden assignment before a returned unit is redelivered; retain actual material removals/additions, moisture/gas changes and incremental repair/test/service burden on its original cohort. Historical manufacture is not recharged to unrelated current Q. Record damaged units and stock loss rather than silently deleting them. Packaging gross physical balance does not depend on allocated life shares.	ilcd-attributional-2010; bostik-5000-application
asset_manufacture_conservation	existing capital/reusable manufacture attribution	Within the applicable allocation decision context, original manufacture burden attributed across uses of actual capital equipment or reusable articles already included in foreground production, packaging or observed services uses one persistent same-asset ledger across all crops, products, cohorts, manufacturing/postrelease services, owners and observation periods. D is its supported whole installed service: all realized historical service plus supported remaining service in the same units as actual beneficiary use u; D must be finite and positive. Period capacity, remaining-only capacity, the physical asset/article mass alone, or current-period product Q alone is not D; supported whole-service throughput in mass units may be used when it demonstrates the causal service and matches u. This does not amortize the manufactured reference product over downstream life or change its declared reference gate/Q. The fractions u/D and all previously assigned manufacture shares together must never exceed 1. Changes of window, custody, provider or repair never restart the original manufacture balance. Replacements have distinct identities and only their real new manufacture vectors; actual repair and treatment increments remain separately accounted. Revised capacity evidence requires transparent reconciliation of prior shares and sensitivity, not a fresh ledger. Keep full physical mass and stock movements independent of burden shares. Unknown D, prior shares or beneficiary coverage requires review and no final manufacture-attributed amount; no assumed lifetime, utilization, zero or arbitrary division is permitted. For each existing collection protocol that attributes manufacture of included production, packaging or observed-service assets across uses in this route (excluding amortization of the manufactured reference product itself), additionally retain a durable asset identity, its measured full physical mass and acquisition/installation/retirement stock history, original manufacture burden vector, all historical and current beneficiaries, matched-unit service readings, the evidenced whole installed-service denominator D, supported remaining-service basis and uncertainty, prior assigned shares and remaining original manufacture balance. Carry the ledger across reporting windows and custody/provider changes. Collect actual repair, replacement, recovery and treatment separately; these records do not normalize physical movements or create an additional asset purchase. These are added fields and conservation obligations for the existing applicable protocols, not a new assumed capital inventory.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

For each existing collection protocol that attributes manufacture of included production, packaging or observed-service assets across uses in this route (excluding amortization of the manufactured reference product itself), additionally retain a durable asset identity, its measured full physical mass and acquisition/installation/retirement stock history, original manufacture burden vector, all historical and current beneficiaries, matched-unit service readings, the evidenced whole installed-service denominator D, supported remaining-service basis and uncertainty, prior assigned shares and remaining original manufacture balance. Carry the ledger across reporting windows and custody/provider changes. Collect actual repair, replacement, recovery and treatment separately; these records do not normalize physical movements or create an additional asset purchase. These are added fields and conservation obligations for the existing applicable protocols, not a new assumed capital inventory.

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_manufacture	manufacture	all manufacture materials utilities and waste	raw_activity_records	supplier lot and state; outer/inner pane mass and dimensions; profile alloy and length; joint material; bead size and moisture; full formulation masses; input and waste weights; raw water and energy meter readings with units; equipment fluid opening/closing and inherited vectors; raw/WIP/hold-up opening/closing quantities and per-exchange vectors; failure idle startstop cleanup and rework; destination; uncertainty	Retain original invoices, calibrated scales/meters, stocktakes, SDS/TDS and all successful/failed job records. Collect raw unnormalized quantities; independently sample water/solids and material identities. Link every reading to a process interval and cohort; retain corrected-consumption flag. Actual non-WIP fluid/tooling/other included stock quantities and per-exchange vectors are independent of WIP. For included capital assets additionally retain actual physical acquisition/closing/retirement quantities separately from service vectors; add each actually needed specific flow, with no default asset weight/life.	native units retained with actual conversions	each lot job interval and stocktake	full reporting period including shutdown	selected manufacturer and linked actual suppliers	per reference flow	calibration; invoices; SDS; waste tickets; stock and history ledger
cp_gases	manufacture	each cavity/air-handling gas species and water	raw_gas_and_moisture_records	control volume; each species identity; integrated volume or true rate; time for true rate only; temperature; absolute pressure; humidity; measured composition; independent substance density; cavity retained mass; bead water before/after; wash evaporation; actual condensate origin; gas/water outflow and destination; uncertainty	Collect original paired gross inlet/outlet observations at one defined boundary with independent moisture/gas measurements. Preserve gross quantities, independently evidenced unchanged passthrough, actual retained cavity/bead stock and real net changes as separate linked records. Raw physical closure uses both gross directions. Only a separately documented matched-species/phase/state/boundary passthrough may be removed from BOTH corresponding gross inlet and outlet to derive the net environmental view; never remove it from only one side or add net and gross views together. Resource-from-air and emitted-vapour/species identities remain distinct; no automatic LCIA cancellation or substitution across unmatched chemical/phase/compartment identities. Condensate/adsorption/evaporation and actual atmospheric water entry require independent source/exit evidence. Never infer air composition, cross-substance density, two unknown sinks or reaction yield from a residual.	native volume/rate units and measured kg	each run and paired measurement interval	same full reporting period and stock boundaries	selected cavity/air-handling physical boundary	per reference flow	gas/humidity instrument calibration; paired samples; independent water/species evidence
cp_release	manufacture	first_release	first_quality_release_records	unit ID; both panes and sealed configuration; actual outline/shape and drawing revision; independently measured dimensions; verified rectangular flag or traceable geometry/planimetry and uncertainty; actual one-face projected A_k including sealed edge; calibrated net unit mass; seal/nozzle/corner/cooling inspections; applicable current specification and actual tests; sample/reject disposition; first release time; reporting cohort; raw Q; uncertainty	Measure each actual configuration and link test/release evidence to a unique unit. Determine actual one-face projected A_k from calibrated dimensions/drawing-specific geometry or traceable planimetry. Length × width is only a verified rectangular case; do not substitute a bounding box for a shaped unit. Sum actual A_k of unique first releases as Q; keep net unit/component mass independently measured for physical balances. No guessed kg per unit, fixed kg/m2, density from a secondary property, doubled pane area, service life or manufacturer certification.	m2 and independently measured kg	each unit and first release	full declared release cohort	selected production gate after all required tests	per reference flow	dimension/scale calibration; actual tests; unique release log
cp_handling	handling	FG services and each individual packaging movement	raw_stock_and_dispatch_records	original release/delivery/cohort IDs; opening/closing FG and each exchange vector; gross dispatch and external unit return; reverse original assignment; material additions/removals and gas/water changes; repair/testing/service raw readings; each packaging article composition and mass; mutually exclusive empty attached-WIP attached-FG reusable opening/closing quantities; new purchased; supplier-included receipt; externalreturnreceived; grossout; externalreturnsent; waste; internalreuse; repair and water changes; uncertainty	Scan/count and independently weigh/tare actual units and each packaging direction; stocktake mutually exclusive states and retain supplier-inclusion flags, original cohort history and original-delivery reversal separately from changed physical-return mass/state. Source permission to rewarm surplus sealant or correct molten corners is not permission to repair a failed/broken IGU. Rework/replacement/cleaning is included only when actual manufacturer/system compatibility instructions and acceptance/testing permit it; otherwise retain actual reject/discard and the gap, not an assumed successful repair. Record each actual new/removed pane, profile/joint, bead, sealant, cleaning or gas/water direction and independently measured old/new masses/state with its own specific atomic card before complete data is claimed; no equal-weight, reusable-old-glass/seal/desiccant, repairability or life-extension assumption. Keep original first-release area Q/history fixed and actual incremental service on that cohort. Released custody includes permitted work-in-progress once: either within explicit released-FG substates or as disjoint repair-WIP opening/closing quantities, never both. Materially changed/new route needs renewed applicability.	native counts mass area and energy units	each movement and periodic stocktake	reporting period with full historical cohort links	actual storage/packing/dispatch service gate	per reference flow	dispatch/return tickets; stocktakes; composition; moisture/repair evidence; original burden reversal

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
convert_raw	all inventory rows	Convert original raw units before attribution: measured kWh × 3.6 = MJ; kg from calibrated net weighing; actual one-face whole-unit projected m2 from cp_release. Use measured length × width only for a verified rectangular unit; other actual shapes require their own traceable measured-outline area determination, not a bounding box. An integrated liquid/gas volume is already a quantity and is not multiplied by time again; integrate only true rates. Volume-to-mass needs independently measured density of that actual substance at its declared state, not water density, a fixed kg/m2 or a secondary flow-property factor.	raw readings; calibration; actual state; cp_release	converted raw quantities	lisec-qualitypass-2024; ilcd-attributional-2010
attribute_raw	all inventory rows	Reconcile raw physical movements and every inherited exchange vector before normalization, retaining original undivided records. A_j is the exchange in the declared reporting view attributed to the same release cohort after conversions and evidenced assignment/stock carry/allocation. Gross physical Product/waste/package/return directions retain measured real quantities with their own burden vectors; burden shares, reuse or a corrected-consumption ledger cannot shrink an actual gross movement. Gas/species environmental A_j is separately derived from the paired gross records under cp_gases and balance_water_gas, with the same evidenced passthrough removed on both corresponding sides; retain raw physical quantities and never add both views. Manufacturing vectors include all new first-released output even when closing FG, without subtracting that assigned production again; prior released FG is not new current manufacture. Retain failures/Q=0, all disjoint raw/WIP/hold-up/non-WIP histories and true incremental handling service. Old/returned FG services keep original release-area Q, service horizon and history, not unrelated new-period Q. Separately evidence unused transfers versus spent/waste/leaked charge/tool quantities and their remaining/consumed vectors. If capital-equipment service is included, its actual physical stocks/acquisitions/retirements stay separate from the per-exchange service burden. Correct measured consumption OR its proved equivalent stock/vector account once, not both.	converted raw quantities; cohort vectors; allocation evidence	A_j	ilcd-attributional-2010
normalize_exchange	all inventory rows	q_j = A_j / Q for Q > 0. Execute this division once after convert_raw and attribute_raw; q_j is the exchange per 1 m2 reference flow. For Q = 0 keep A_j and all physical/history records with no unit result. Cards and protocol aggregation reference this same result and never divide again.	A_j; Q; convert_raw; attribute_raw; cp_release	q_j per 1 m2 reference flow	ilcd-attributional-2010
balance_manufacture	manufacture	For each same material/element and declared physical gate close opening disjoint raw/WIP/recoverable hold-up and included non-WIP stocks + all actual gross external physical inputs = corresponding closing disjoint stocks + newly first-released whole-unit mass + every actual gross external Product/waste/species outflow. Link the separately recorded equipment-fluid/tooling stocks of boundary_stocks; cancel only matched internal transfers with real losses and energy retained. Gross atmospheric intake and gross gas/water outflow are used together here: never retain gross intake while replacing its outlet by a net environmental amount. A separately derived paired net environmental view must reduce both matched unchanged inlet and outlet by the same evidenced passthrough; raw gross and net views are linked alternatives, never additive. Retained cavity species and actual adsorbed water are already included once in full released/WIP masses. Newly released mass includes both panes, frame/joints, beads with actual water, both seals and cavity gas. Area Q is not mass, and closing already-released FG is not a further manufacturing output. Do not fit two unknowns with one residual or double-count embedded components.	physical masses; species assays; stock quantities; cp_manufacture; cp_gases; cp_release	independent material and element residuals	guardian-glasstime-2022; fenzi-molver-2021
balance_fg	handling	For each FG cohort opening physical FG + internal newly released receipt + actual external returned units + actual added parts/species/water = closing physical FG + gross physical unit shipments + discarded FG + actually removed material/species/water. Maintain original burden vector separately; no second production output for closing FG. Cancel internal first-release handover in the combined manufacturing/FG gate. If already-released repair-held units are separately identified as repair WIP, include their disjoint opening and closing physical component/state terms once; otherwise explicitly include them within released-FG custody stock. Never assume original delivery mass/contents equal a changed physical return. Repair remains conditional on the actual instruction/compatibility/acceptance gate of cp_handling; broken/failed glass is not restored by bookkeeping.	FG physical stocks; gross dispatch; returns; additions; removals; cp_handling	cohort FG mass and area reconciliation	ilcd-attributional-2010; guardian-glasstime-2022
balance_packaging	handling	For each packaging article separately: opening empty + opening attached-WIP + opening attached-FG + opening reusable + new separately purchased + supplier-included arriving + externalreturnreceived = closing empty + closing attached-WIP + closing attached-FG + closing reusable + gross physically shipped outward + externalreturnsent + waste. Stock buckets are mutually exclusive; internal reuse cancels. Measure actual cork/wood water change and repair new/removed components separately if present, with their own atomic flows; track quality/history vectors. No net-shipment shortcut or automatic repurchase/credit.	each article movement; stocktakes; moisture; repair; cp_handling	per-article gross physical reconciliation	bostik-igu-hotmelt; fenzi-aluminium-spacer; fenzi-molver-2021
balance_water_gas	manufacture and handling	Keep free wash water, supplied formulation water, bead residual/structural water, adsorbed moisture, humid-air intake/outflow and actual condensate as different physical accounts at the same control volume. Independently measure water and species transfers; retained/desorbed moisture is not fictitious reaction water. Thermoplastic cooling creates no assumed gas stoichiometry. Gross N2/O2/Ar/CO2/H2O passthrough is paired before identifying actual net species changes; COD/VOC/total-element indicators are not species masses.	independent water/species observations; actual gas state; cp_gases; cp_manufacture	water and individual-species balances	guardian-glasstime-2022; fenzi-molver-2021; bostik-igu-hotmelt
asset_manufacture_share	existing capital/reusable manufacture attribution	For each included original asset manufacture vector B, f_current = u_current / D only after the persistent ledger verifies the supported whole installed-service denominator, all beneficiaries and prior assigned shares. Attribute f_current * B once to the actual beneficiary before the existing single reference normalization. Check prior_shares + all current/new beneficiary shares <= 1; carry the remaining original balance. Capacity revisions reconcile the historical ledger. Full physical asset/packaging mass and actual gross stocks/returns never receive f_current. Unknown D or history leaves the final attributed result unavailable, without suppressing actual repair/replacement/service burdens.	asset_id; original_B; u_current; D; historical_beneficiaries; prior_shares; capacity_evidence	conserved attributed manufacture vector

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	all rows	Match actual type, composition, formulation, CAS, particle/form, route, geography, voltage, medium and reference property; UUID is identity rather than provider approval. Preserve all stated native restrictions on each row. Unbound auxiliary identity cannot become an unspecified collection.	direct native records; supplier SDS/TDS; test and provider documents
dq_complete	raw inventory and stocks	Cover the full period including failure/zero output, all stock layers and equipment charges. Maintain per-exchange inherited vectors and original cohort/service attribution. Unknown, absent, measured zero and below detection are different; report unresolved physical residuals honestly.	raw stock/meter records; balance residuals and uncertainty
dq_sources	all constrained rules	Retain primary scope and alternatives. This synthesis does not assert a common plant/SKU or transfer supplier numbers across products. Industrial sources do not support allocation. Standards mentioned by manufacturers require the actual applicable version and real test evidence; product claims alone are not conformity.	primary originals and full context; actual specification and test records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_scope	dataset applicability	Verify two annealed uncoated panes, aluminium/desiccant frame, separate PIB primary and thermoplastic hot-melt secondary, air fill and protected edge terminal. Reject mirror, single-seal, TPS, inert-gas, reactive-seal or structural/exposed-edge substitution under this route.	guardian-glasstime-2022; bostik-igu-hotmelt; fenzi-hotver-2000
validate_gate	Q and first_release	Require unique first-release/test evidence and one-face whole-unit area; verify the explicitly linked Product output equals 1 m2 and no new Q from retest/returns. Separate both pane masses and cavity contents. No manufacture output for closing FG in addition to Q.	guardian-glasstime-2022; bostik-5000-application
validate_accounting	all inventories	Check complete manufacturing/FG/combined mass gates, each relevant element and species, raw-to-converted-to-attributed quantities, complete historical vectors, packaging gross equation and exactly one normalize_exchange operation. Q=0 has real raw burden and no unit result. Do not close two unknowns with one residual or characterize whole wastewater as a chemical.	ilcd-attributional-2010; fenzi-molver-2021; guardian-glasstime-2022
validate_release	quality and usability	Retain actual applicable product/system specification, geometric/edge-seal checks, primary continuity, secondary wetting/depth/corners, desiccant condition, cooling/handling support and actual test results before first release. A handling-time brochure figure, UUID or projection pass proves neither quality conformity nor scientific approval. Missing terminal tests or core route evidence prevents a ready dataset; future site-specific quantities and auxiliary UUIDs remain required without invented defaults.	guardian-glasstime-2022; bostik-5000-application; lisec-qualitypass-2024; fenzi-molver-2021
validate_asset_manufacture_conservation	existing capital/reusable manufacture attribution	For every included capital/reusable manufacture attribution verify same-asset continuity, whole installed service in matched units, all historical/current beneficiaries, prior assigned manufacture shares and cumulative share <= 1. Reject a reset by period, cohort, provider, owner or repair. Check distinct real replacement and incremental repair/treatment vectors separately and preserve gross physical mass. A missing denominator, unexplained previous allocation or incomplete beneficiary ledger requires explicit review and an unavailable final attributed amount; structural inspection cannot claim empirical completeness.

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset; background_dataset
downstream_use	Declared unframed insulating-glass input to compatible downstream window/building models
allowed_use	Same specified air-filled two-pane dual-seal route with actual measured configuration and full burdens
excluded_use	Mirror or all-CPC coverage; thermal equivalence; certification; complete window; unsupported route or default factory inventory
required_metadata	site and reporting period; first quality-release gate and unique cohort IDs; two uncoated annealed soda-lime panes and suppliers; pane dimensions thickness edge preparation and full supplier burden; single-face projected whole-unit area including sealed edge; aluminium spacer alloy geometry joint composition and desiccant filling; 3A bead grade size supplied moisture and exposure; whole PIB primary formulation and hot-melt secondary formulation; nozzle temperature wetting corner continuity seal depth cooling and release tests; air cavity gas composition humidity temperature pressure and retained mass; protected edge application and excluded structural exposed-edge use; opening closing WIP FG equipment fluids and per-exchange inherited vectors; gross packaging movements composition moisture repair and stocks; actual electricity voltage geography mix and water supply/treatment boundary; independent species balances uncertainty and receiving destinations; attributional allocation applicability causal drivers and residual market evidence
required_quality_disclosure	Actual quality/test coverage; source limits; supply identity restrictions; unbound rows; measured residuals; uncertainty; allocation and stock/cohort history; no invented quantities
update_trigger	Change in terminal, pane treatment/coating, gas, spacer, seal chemistry, supply state, specification, allocation evidence or physical stock method

11. Data Sources

Source id	Type	Reference	Used for
guardian-glasstime-2022	handbook	Guardian GlassTime, August 2022, §§2.1–2.4 and 9.2.5; https://www.guardianglass.com/content/dam/guardianindustriesholdings/technical/europe/GlassTimeHandbook_EN_0822.pdf	Unit architecture; dry-air drawing; dual barriers; UV exclusions; dimensional inspection context. No default performance or inert-gas recipe.
bostik-igu-hotmelt	handbook	Bostik, Smart Seal Good Feel, 2018 brochure, pp.3–6; https://www.bostik.com/files/live/sites/shared_bostik/files/import-uk/bostik-insulating-glass.pdf	Compounded PIB primary and one-part butyl hot-melt secondary supply; heated application and cooling; drum/block alternatives and final limitations. Marketing waste/timing figures are not inventory defaults.
bostik-5000-application	handbook	BOSTIK 5000 product overview and Applications & Features, snapshot 2026-10-20; https://www.bostik.com/uk/en_GB/catalog/product/f/bostik_dg_butyl_ig_emea/p/bostik-5000/	Heated dispenser; nozzle-temperature checks; wetting and corner/seal-depth checks; support under both panes. Page announces a new version; historical route support only.
fenzi-hotver-2000	handbook	Fenzi Hotver 2000 product/application/storage text, snapshot 2026-10-20; https://www.fenzigroup.com/en/products/igu/sealants/hotver/hotver-2000	Independent one-part thermoplastic secondary-seal example; clean dry substrate; rewarming surplus; single-seal counterexample excluded. Brand-specific temperatures and certification claims are not transferred.
lisec-vhw-f-washing	handbook	LiSEC VHW-F full product page, snapshot 2026-10-20; https://www.lisec.com/solutions/individual-machines/detail/wash/vhw-f	Washing zones; treated water; blower drying; heating and cleaning; optional circulation. This is component-level evidence rather than one complete factory.
lisec-bsv-spacer-forming	handbook	LiSEC BSV-45ANK full product page, snapshot 2026-10-20; https://www.lisec.com/solutions/individual-machines/detail/frame-processing/bsv-45ank	Profile sawing; connection; bending geometry; aluminium subset. Plastic hot bending is an excluded alternative.
lisec-qualitypass-2024	handbook	LiSEC, lis.qualitypass – Traceable quality in insulating glass production, 23 April 2024; retained full page snapshot 2026-10-20; https://blog.lisec.com/qualitypass	Linking pressure/temperature/time and structure to automatic and manual quality records. Software deployment and its version requirements are not PCR requirements.
fenzi-molver-2021	handbook	Fenzi MOLVER MGM 01 Technical Data Sheet, Revision 08 October 2021, complete one-page original hosted by Tecglass; https://tecglass.es/wp-content/uploads/2021/11/MOLVER-MGM-01_Technical-Data-Sheet_20211019.pdf	3A granular desiccant compatible with hot-melt second barriers; water adsorption and residual-water distinction; supply packaging. No dose or adsorption yield default.
fenzi-aluminium-spacer	handbook	Fenzi Aluminum Spacer H65, snapshot 2026-10-20; https://www.fenzigroup.com/en/products/igu/spacers/conventional/aluminum-h65	Supplied aluminium-alloy spacer profile and optional connectors; cardboard/steel supply containers. No assumed connector composition or universal profile dimension.
ilcd-attributional-2010	official_guidance	European Commission JRC, ILCD Handbook General guide for LCA, Detailed guidance, first edition March 2010, §7.9.3 pp.257–258; https://eplca.jrc.ec.europa.eu/uploads/ILCD-Handbook-General-guide-for-LCA-DETAILED-GUIDANCE-12March2010-ISBN-fin-v1.0-EN.pdf	Attributional allocation cases only: subdivision; determining exchange-specific physical causality; residual actual-state common-gate market value. No recipe, emission factor, stock formula or automatic credit.