The Carbon Index application is an enterprise in-BIM embodied carbon estimation, solid geometry take-off, material lifecycle analysis, and statutory compliance platform designed for the RICS Whole Life Carbon Assessment (WLCA) 2nd Edition (2023), Building Transparency EC3 (Embodied Carbon in Construction Calculator), BS EN 15978:2011, and ISO 14040/44 / 21930 international environmental standards.
This documentation suite provides operational guides, architectural specifications, and compliance workflows for sustainability directors, cost consultants, structural engineers, and BIM coordinators.
docs/index-itwin/carbon-index/
├── README.md # Documentation suite index and statutory standards overview
├── overview-cbs.md # Overview & Carbon Breakdown Structure (CBS) Engine
├── material-mapper.md # EC3 Material Mapper, EPD Linking & Scope Reconciliation
├── mass-qto.md # Solid Geometry & QTO (Bentley Parasolid B-Rep Engine)
├── thematic-heatmap.md # 3D Viewport Embodied Carbon Heatmap & Thematic Shading
├── publish-sync.md # Publish & Micro-IFC Schema Synchronization Engine
├── wlca-dossier.md # RICS Whole Life Carbon Assessment (WLCA) Dossier Generator
└── configure.md # Configure Carbon Profiles, Baselines & Rule Sets
| Guide | Description | Key Capabilities |
|---|---|---|
| 1. Overview & CBS Breakdown | Real-time carbon estimation executive dashboard, KPIs, and Carbon Breakdown Structure. | Upfront Carbon ($A1–A5$ tCO₂e), Whole Life ($A–C$ tCO₂e), Intensity ($kgCO_2e/m^2$ GIA), Benchmark rating ($A–G$), NRM elemental breakdown, and CBS grouping cards. |
| 2. EC3 Material Mapper | Advanced material resolution engine linking BIM elements to ICE v3 and Building Transparency EC3 EPDs. | Live EC3 OpenXPD EPD search, CI Canonical material benchmarks, exact/regex rule matcher, custom density/factor overrides, and scope exclusion. |
| 3. Solid Geometry & QTO Grid | Bentley native B-Rep Parasolid mass properties extraction and physical volume reconciliation. | IModelReadRpcInterface.getMassPropertiesPerCandidate integration, void discount verification, density weighting ($kg/m^3$), and BBox variance tracking. |
| 4. 3D Embodied Carbon Heatmap | Interactive 3D thematic viewport shading and visual carbon hotspots audit. | Four-tier intensity gradient (Low → Severe), data quality tier shading, element isolation, context ghosting, and element inspection drawer. |
| 5. Publish & Micro-IFC Sync | Changeset persistence and OpenBIM Micro-IFC schema injection. | Local browser cache (IndexedDB) → Carbon_Schema ECSchema dynamic injection, element aspects (Carbon_Asset_Aspect), and OpenBIM IFC export. |
| 6. RICS WLCA Dossier Engine | Comprehensive statutory lifecycle assessment report aligned with RICS WLCA 2nd Edition. | 6-stage lifecycle breakdown ($A1–A3, A4, A5, B1–B5, C1–C4, D$), data quality audit tiers, print-ready PDF formatting, and JSON audit bundle export. |
| 7. Configure Carbon Profiles | Profile builder for project baselines, Gross Internal Area (GIA), and mapping rules. | Multi-tier configuration profiles, custom density/A1–A5 rules, property sub-groupings, and locked corporate defaults. |