Versioning summary

Understand the main changes of BCome products as well as the content of the different versions released.

The database is reviewed at least on a 6-month basis in order to model the background processes with the most recent data. Periodically, an extensive data search is performed in order to identify new and better data. In case it can be found, the previous data is removed from the database and substituted with the higher quality data.

The updates are released through a new database version to keep consistency. In any case, all the data has been extracted from international databases, institutes, and organizations, and from research in specialized literature, which guarantees the good quality of the data we use. The client can access the modeling sheet of any data upon request.

Overview of changes

The main changes implemented by BCome along the different versions are summarized in Table 01. For more information, please check the detailed summary of changes:

Version	Impact database	Traceability form	Methodology
BCome 2.0	–	Durability and use practices questionnaire replaces category-specific eco-design tables: universal article-level questions (material quality test class per ISO 105/ISO 12945, repairability design, timeless design, modularity/adjustability) and brand-level questions (extension-of-life services, care communication, product range breadth). New component separability declaration (zippers, buttons, interlinings).	Renamed from Circular Economy Indicators (CEI) 1.2; indicators reordered to match platform (Materials, Durability, Waste, Recyclability, Collection & end-of-life). Materials: recycled + reused content merged into one indicator (F_RU), traced at raw-material (fiber) level; new Verified recycled content indicator (certified vs. declared, GRS/RCS/EuCertPlast/TÜV SÜD/SRCCS). Durability: Utility factor rebuilt as Durability × Brand Use Enablement (replacing Length-of-use × Intensity-of-use); new Repairability score (0–6) incl. repair-cost-to-price ratio (Ecobalyse/ADEME); Brand Use Enablement now quantifies repair/care services, care communication, and product range breadth (Ecobalyse SKU-density index). Waste: Feedstock recycling waste (WF) now calculated bottom-up per fiber; production waste (WLR) formula made explicit; Recycling/Reuse (CR/CU) now declared as %, not kg; recycling efficiency (EC) declared per article; Compost and Sustainable incineration no longer separately calculated. Recyclability: new Recyclability index and End-of-Life circularity indicators. Collection & end-of-life: new Total collection rate and Collection vs. EPR-benchmark indicators.
BCome 1.8.2	165 new datasets: 89 regionalization datasets (new process×origin combinations) and 76 renewable energy variants (Photovoltaic, Wind) across Extraction, Processing, Finishing, and Manufacturing.	Declaration of renewable energy mix per supplier: % Photovoltaic, % Wind, and % Hydro.	LCA: New weighted calculation based on supplier’s renewable energy mix (% Photovoltaic, % Wind, % Hydro declared per supplier). Support for energy type in origin processes. Improved transparency in impact exports (energy type and mix percentages). Reusable packaging: dynamic online/offline percentages replace fixed 50/50 logic. Eco-Score: Renewable energy best practice weighted by declared percentages.
BCome 1.8.1	Linking architecture refactored (3-parameter key: Process – Origin – Database Context). Nomenclature updates for 7 datasets. New datasets for sticky database logic. New regionalized datasets. Deprecated datasets with origin encoded in name.		LCA: New data selection logic (EF database preferred; specific geography in Ecoinvent takes priority over generic EF match). Averages never mixed across databases. Automatic calculation of all 16 PEF indicators + water consumption in a single run. New “Datasets summary” sheet in Material Impact and Article Impact Excel exports.
BCome 1.8	104 new processes 17 new packaging 26 new product categories 733 impact datasets updated to PEF 3.1 and ecoinvent 3.11 – cutoff. Review of all the metadata. 53 new certificates.	Simplification of Suppliers declaration: Tier, Stages & Certificates. Raw materials: Declaration of tanning in the composition. Dyeing: New nomenclature.	LCA: Cutoff modeling – ecoinvent EUTREND methodology for eutrophication – freshwater Circular Footprint Formula from the PEF for recycled content modeling Eco-Score: Material-Planet, Supplier-Planet, and Supplier-People practices reviewed.
BCome 1.7	90 new processes 16 new packaging 62 new product categories 456 reviewed impact datasets updated to MSI version 3.8 and ecoinvent 3.10. Review of all the metadata. Benchmark origin database for Raw material extraction, material processing and manufacturing.	Traceability rating system for data collection. Origin of raw materials to be declared in Step 3: Supply.	LCA: IPCC 2021 methodology Manufacturing loss rates based on the product category Benchmark origins considered for transportation Yarn and Material specifications Seamless and sewn tricot products manufacturing specifications
BCome 1.6	51 new processes 20 new packaging 6 new product categories Entire new SLCA database available	Retail packaging declaration in a separate sheet. Option to declare dye processes with or without pretreatments. Supplier’s complete address declaration. Declaration of costs for SLCA. Declaration of retail countries for SLCA.	PLM: Visualization of Unknown processes in platform LCA: More precision with dye pretreatments consideration. SLCA: New methodology available. New SLCA indicators: Child labor, Frequency of forced labor, Trade unionism, Fair wages, Safety measures, Gender pay gap, Weekly hours of work per employee, Women in the sectoral workforce, Social security expenditures, Biomass consumption, Unemployment, Drinking water coverage and Pollution.
BCome 1.5	145 new processes 48 new packaging 25 new product categories and reviewed product groups 293 reviewed impact datasets including all MSI datasets updated to MSI version 3.5 and ecoinvent 3.8 Review of all the metadata.	Online sales vs. offline sales share. Unitary packaging declaration for online and offline sales. Hazardous substances per article. Tanning is to be reported as a finishing.	Improvement of retail packaging impact & logistics impact calculation. Unitary print impact for articles. New inventory indicator: Water consumption. French AGEC law indicators: Traceability, Incorporation of recycled material, Recyclability, Presence of plastic microfibers, Possibility of re-employment, Presence of dangerous substances.
BCome 1.4.1	No change	New suppliers must be declared in the form. Articles and materials can both have a dye, a print, and a treatment process.	Reviewed calculation of Eco-score: Supply chain traceability, GMO-free, animal welfare assured. The Eco-Score is now rated with an A to E score. New CE Indicators: Feedstock, life cycle waste, end-of-life, utility, and overview indicators.
BCome 1.4	63 new datasets including 14 new regionalized datasets 80 reviewed impact datasets including all MSI datasets updated to MSI version 3.3 78 datasets removed	21 datasets nomenclatures changed (in the drop-down menus) 5 new material categories: Plastic (extruded), Metals (cold formed), Metals (extruded), Metals (forged), Composite (film stacking). 4 reviewed material categories nomenclatures 34 new product categories Introduction of the CEI parameters in the form.	The benchmark scenario redefined Uniformized allocation methodologies for recycled and second-hand materials. Default metal processes review. Default plastic processes review.
BCome 1.3	54 new datasets, including 15 new regionalized datasets, 51 reviewed impact datasets 19 datasets removed	New suppliers must be declared in the form. Articles and materials can all have a dye, a print, and a treatment process.	85 datasets nomenclatures changed (in the drop-down menus), 5 new material categories: Synthetic leather, Top grain leather, Corrected grain leather, Bicast leather, Patent leather 1 reviewed material category nomenclature 22 new product categories
BCome 1.1 BCome 1.2	Water indicator: AWARE methodology instead of Pfister et al. Default polymers processes review Default leather processes review, Transport calculation review	New LCA indicator: Abiotic depletion Standalone indicator removal: Waste Material and manufacturing losses considered in the LCA. Default leather processes review Default laminated plastic processes review. Average ranges of distances based on the country area considered for national journeys. All impact indicators are now considered for transportation and manufacturing.	74 datasets nomenclatures changed (in the drop-down menus), 3 types of packaging per life cycle step

Indicators modifications

Traceability

Most of the Traceability indicators did not change in their methodology. The number of life cycle stages calculation was optimized in BCome 1.4.1. In addition, two new indicators were welcomed in BCome 1.4.1: the number of stages and suppliers traced and the Traceability score.

Current name	Nº of processes	Nº of km	Nº of life cycle stages	Nº stages & suppliers traced	Traceability score
BCome 1.0 BCome 1.1 BCome 1.2 BCome 1.3 BCome 1.4	Name: Nº of processes Unit: – Methodology: Based on BCome DB	Name: Nº of km Unit: km Methodology: Searate	Name: Nº of life cycle stages Unit: – Methodology: Internal methodology	–	–
BCome 1.4.1 BCome 1.5 BCome 1.6 BCome 1.7 BCome 1.8	Name: Nº of processes Unit: – Methodology: Based on BCome DB	Name: Nº of km Unit: km Methodology: Searate	Name: Nº of life cycle stages Unit: – Methodology: Optimized Internal methodology	Name: Nº of life cycle stages Unit: – Methodology: Internal methodology	Name: Traceability score Unit: % or Low to High score Methodology: Internal methodology based on the supply chain knowledge.

LCA & Stage Comparator

The LCA underwent several changes in terms of nomenclature, units, and methodologies (Table 03). The Water use indicator first changed its methodology to AWARE in BCome in 1.1. BCome 1.3 welcomed a new indicator based on fossil energy consumption: Resource use – Fossil fuels. Then, the nomenclature of Water use and Resource use – fossil fuels was changed to Water scarcity and Abiotic depletion, respectively, in BCome 1.4.1. The water scarcity and eutrophication units were also modified for a better understanding in BCome 1.4.1. In BCome 1.7 the global warming indicator was updated to IPCC 2021. In BCome 1.8, the eutrophication indicator (freshwater) is updated to the EUTREND model.

Current name	Water scarcity	Global warming	Eutrophication	Abiotic depletion	Water consumption
BCome 1.0	Name: Water use Unit: l H₂O Methodology: Pfister et al.	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2013 GWP 100a method	Name: Eutrophication Unit: g PO₄^3-eq Methodology: CML-IA baseline	–	–
BCome 1.1 BCome 1.2 BCome 1.3 BCome 1.4	Name: Water use Unit: m³ eq Methodology: AWARE (Available WAter REmaining)	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2013 GWP 100a method	Name: Eutrophication Unit: g PO₄^3- eq Methodology: CML-IA baseline	Name: Resource use – Fossil fuels Unit: MJ Methodology: CML-IA baseline	–
BCome 1.4.1	Name: Water scarcity Unit: m³ water eq Methodology: AWARE (Available WAter REmaining)	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2013 GWP 100a method	Name: Eutrophication Unit: g phosphates eq Methodology: CML-IA baseline	Name: Abiotic depletion Unit: MJ Methodology: CML-IA baseline	–
BCome 1.5 BCome 1.6	Name: Water scarcity Unit: m³ water eq Methodology: AWARE (Available WAter REmaining)	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2013 GWP 100a method	Name: Eutrophication Unit: g phosphates eq Methodology: CML-IA baseline	Name: Abiotic depletion Unit: MJ Methodology: CML-IA baseline	Name: Water consumption Unit: liters
BCome 1.7	Name: Water scarcity Unit: m³ water eq Methodology: AWARE (Available WAter REmaining)	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2021 GWP 100a method	Name: Eutrophication Unit: g phosphates eq Methodology: CML v4.8 2016	Name: Abiotic depletion Unit: MJ Methodology: CML v4.8 2016	Name: Water consumption Unit: liters
BCome 1.8	Name: Water scarcity Unit: m³ water eq Methodology: AWARE (Available WAter REmaining)	Name: Global warming Unit: kg CO₂ eq Methodology: IPCC 2021 GWP 100a method	Name: Eutrophication – freshwater Unit: g P eq Methodology: EUTREND	Name: Abiotic depletion Unit: MJ Methodology: CML v4.8 2016	Name: Water consumption Unit: liters

Circularity

In the first versions of BCome, a waste indicator was calculated based on an internal methodology. It was removed from version 1.3. BCome 1.4.1 was released with 5 new groups of indicators for circularity and new methodologies based on the Ellen MacArthur Foundation and internal know-how. This structure remained unchanged through BCome 1.8.2. BCome 2.0 renames the module Circularity, expands it to 6 groups of indicators by introducing Recyclability, and updates the calculation of several existing indicators to keep the methodology aligned with the latest Ellen MacArthur Foundation guidance, Ecobalyse reference data, and emerging EU regulation (ESPR, EPR schemes for textiles, and the Green Claims Directive).

Current name	Overview indicators	Materials	Durability	Waste	Recyclability	Collection & end-of-life
BCome 1.0 BCome 1.1 BCome 1.2	–	–	–	Name: Waste Unit: kg Methodology: Internal methodology	–	–
BCome 1.3 BCome 1.4	–	–	–	–	–	–
BCome 1.4.1 BCome 1.5 BCome 1.6 BCome 1.7 BCome 1.8 BCome 1.8.1 BCome 1.8.2	Name: MCI Unit: 0-1 score Methodology: MCI of Ellen MacArthur Foundation.	Name: Article composition (recycled, reused, sustained, virgin) Unit: kg Methodology: Extrapolation from the brand declaration.	Name: Length of use, Intensity of use, and Utility. Unit: market average ratio Methodology: Internal methodology based on the MCI of Ellen MacArthur Foundation and WRAP (2006).	Name: Production waste (cradle-to-gate), Recycling waste (Article), Total unrecoverable waste Unit: kg Methodology: Internal methodology based on the MCI of Ellen MacArthur Foundation and estimated process loss rates.	–	Name: End-of-life collection (recycling, reuse, compost, sust. incineration, landfill) Unit: kg Methodology: Extrapolation from the brand declaration and Sandin, G. and Peters, G. M. (2018).
BCome 2.0	Name: MCI (Circularity score) Unit: 0-1 score Methodology: MCI of Ellen MacArthur Foundation — top-level LFI/MCI formula unchanged; inputs (V, W, X) recalculated per the columns below.	Name: Recycled & reused content (F_RU), Virgin sustained content (F_S), Virgin content (V), Verified recycled content Unit: kg or % Methodology: Extrapolated from Step 1: Article and Step 2: Material, traced at raw-material (fiber) level. Verified recycled content backed by GRS/RCS/EuCertPlast/TÜV SÜD/SRCCS certificates.	Name: Durability score, Repairability score, Brand Use Enablement, Utility (X) Unit: 0–100 (Durability), 0–6 (Repairability), market average ratio (Brand Use Enablement, Utility) Methodology: Internal methodology based on universal article-level and brand-level practices, Ecobalyse/ADEME repair-cost reference, and the MCI of Ellen MacArthur Foundation for the Utility cap.	Name: Feedstock recycling waste (WF), Production waste (WLR), Article recycling waste (WC), Total unrecoverable waste (W) Unit: kg Methodology: WF calculated bottom-up per raw material/fiber; WLR = assembly loss rate × M + Σ(material loss rate × material mass), explicit; internal methodology based on the MCI of Ellen MacArthur Foundation.	Name: Recyclability index, End-of-Life circularity Unit: 0–100% Methodology: New indicator group. Recyclability index = Monomateriality score × Fiber recyclability score × Finishing penalty; End-of-Life circularity = weighted combination of Recyclability index, Total collection rate, and Component separability score.	Name: Recycling (CR), Reuse (CU), Landfill (W0), Total collection rate, Collection vs. benchmark Unit: % (was kg) Methodology: CR/CU declared as % blending the brand’s take-back rates with 12.5%/12.5% global default market rates (Sandin & Peters, 2018; Juanga-Labayen, 2022). Compost and Sustainable incineration no longer calculated.

Eco-Score

The nomenclature of the Eco-Score area did not change since the first version of the methodology. The only change is based on the visualization of the final score, which is now represented by an A-E score instead of 1-10 points (Table 05).

Current name	Planet	People	Transparency	Circularity
BCome 1.0 BCome 1.1 BCome 1.2 BCome 1.3	Name: Planet Unit: 1 to 10 points Methodology: Internal qualitative methodology	Name: People Unit: 1 to 10 points Methodology: Internal qualitative methodology	Name: Transparency Unit: 1 to 10 points Methodology: Internal qualitative methodology	Name: Circularity Unit: 1 to 10 points Methodology: Internal qualitative methodology
BCome 1.4 BCome 1.4.1 BCome 1.5 BCome 1.6 BCome 1.7 BCome 1.8	Name: Planet Unit: A-E score Methodology: Internal qualitative methodology	Name: People Unit: A-E score Methodology: Internal qualitative methodology	Name: Transparency Unit: A-E score Methodology: Internal qualitative methodology	Name: Circularity Unit: A-E score Methodology: Internal qualitative methodology