DELIVERY
RIBA stages 0–7
Stage deliverables, required inputs and gates. Every status is derived from the project's evidence; provisional or evidenced is not engineering approval. Stages 5–7 are interface definitions only.
Stage status
UK mechanical services — RIBA Plan of Work 2020 (default)Current: Stage 4 — Technical Design (derived from evidence) — 5 of 7 deliverables produced, 2 gates open. Statuses are derived from evidence. Provisional / evidenced is not engineering approval; Stages 5-7 are interface definitions only.
| Stage | State | Deliverables produced | Gates |
|---|---|---|---|
| Stage 0 — Strategic Definition | in progress | 1 / 2 | open |
| Stage 1 — Preparation and Briefing | in progress | 2 / 3 | open |
| Stage 2 — Concept Design | in progress | 2 / 2 | open |
| Stage 3 — Spatial Coordination | in progress | 4 / 4 | open |
| Stage 4 — Technical Design ◀ current | in progress | 5 / 7 | open open |
| Stage 5 — Manufacturing and Construction | not automated | interface only | not automated |
| Stage 6 — Handover | not automated | interface only | not automated |
| Stage 7 — Use | not automated | interface only | not automated |
RIBA Plan of Work 2020 stage names; deliverable split after BSRIA BG 6 (engineering.delivery.framework). Wording and mappings are Hexanta's. Evidence from: Change run — criteria revision 3 — RECORDED (verified evidence, not re-run).
Stage 0 — Strategic Definition
in progress Required inputs: client requirements, site information.
| Gate | State | Detail |
|---|---|---|
| Client confirms the strategic brief | open | no checking / sign-off recorded (no verified engineer) |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Project profile (jurisdiction, building type, disciplines, software) | project lead | provisional | project profile | |
| Business case and client requirements Client document; not produced by Hexanta. | client | not started |
Stage 1 — Preparation and Briefing
in progress Required inputs: architectural template, project profile.
| Gate | State | Detail |
|---|---|---|
| Design criteria agreed with the client | open | no checking / sign-off recorded (no verified engineer) |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Mechanical design criteria (internal conditions, occupancy, ventilation rates) | building services engineer | provisional | criteria revision 3 | |
| Architectural basis (room template / geometry) | architect | provisional | input architecture_template revision 1 | |
| Design-responsibility allocation Framework implemented (engineering.delivery.framework.scope); no appointment recorded for this project. | project lead | not started |
Stage 2 — Concept Design
in progress Required inputs: design criteria, architectural basis.
| Gate | State | Detail |
|---|---|---|
| Concept systems strategy accepted | open | no checking / sign-off recorded (no verified engineer) |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Room heating and cooling loads (native IESVE) | building services engineer | evidenced | native iesve: native_verified (not engineer approved) | wf1-NATIVE-IESVE-RUN4-20261019-r3 |
| Design criteria and systems strategy report | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | documents/WF1_Mechanical_Design_Criteria_Report.docx |
Stage 3 — Spatial Coordination
in progress Required inputs: room loads, mechanical configuration.
| Gate | State | Detail |
|---|---|---|
| Spatially coordinated design accepted | open | no checking / sign-off recorded (no verified engineer) |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Coordinated design model (basis) | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | model/wf1_stage3_model.json |
| Stage 3 schedules | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | documents/WF1_Stage3_Schedules.xlsx |
| Outline specification | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | specification/VERIFY.txt |
| Design-basis drawings | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | drawings/WF1-HXA-ZZ-GF-DR-M-5001.dxfdrawings/WF1-HXA-ZZ-GF-DR-M-5002.dxfdrawings/WF1-HXA-ZZ-GF-DR-M-5101.dxf… 13 more |
Stage 4 — Technical Design (current)
in progress Required inputs: coordinated plan, selection register, manufacturer data, fitting-loss source.
| Gate | State | Detail |
|---|---|---|
| Engineer checking and sign-off recorded | open | no checking / sign-off recorded (no verified engineer) |
| Engineering closeout register cleared | open | 20 closeout items outstanding (closeout register) |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Design calculations (loads, ventilation, plant, hydronic and air sizing, pressure losses) Pump and fan duties are partial lower bounds (CIBSE Guide C fittings; out-of-range cases bounded); design margins not set. | building services engineer | provisional | Change run — criteria revision 3 — RECORDED (verified evidence, not re-run) | workbook/HEXANTA_WF1_MECHANICAL_DESIGN_CALCULATIONS.xlsxwf1-RUN4-STAGE4-WORKBOOKS-20261020 |
| Selected equipment (provisional) | building services engineer | provisional | 93/96 catalogue-selected, 74 duty verified, 39 dimension verified, 0 BIM, 22 confirmation required | wf1-RUN4-EQUIPMENT-STATUS-20261020-r3wf1-RUN4-STAGE4-WORKBOOKS-20261020 |
| Native Revit MEP model | building services engineer | evidenced | native revit: native_verified (not engineer approved) | wf1-NATIVE-REVIT-APS-MEP-20261019-1ce22c7e |
| Coordinated drawings (native AutoCAD) | building services engineer | evidenced | native DWG verified; not engineer approved | wf1-RUN4-COORDINATED-DRAWINGS-20261020-r2wf1-NATIVE-DWG-RUN4-COORD-20261020-r2 |
| Specification (NBS) NBS is a separate pending workstream (licence). | building services engineer | pending external | ||
| Bill of quantities / cost plan | building services engineer | partial | Quantities reconciled; no held rates - any cost shown uses illustrative rates | takeoff/TAKEOFF_ACCURACY.mdtakeoff/takeoff_accuracy.json |
| Engineering review and sign-off | building services engineer | outstanding | no checking / sign-off recorded (no verified engineer) |
Stage 4 equipment and calculation workbooks
PROVISIONAL - NOT ENGINEER APPROVED - NOT FOR CONSTRUCTION · revision S4-P01 · 2026-10-20 · evidence wf1-RUN4-STAGE4-WORKBOOKS-20261020. Evidence files read from this host (not stored in the project): built from the sources listed per run, not re-run here. Calculation workbooks that contain licensed reference data stay on this host and are not for onward distribution.
Run 3 - baseline (tag wf1-run3-baseline-20261019) (4)
Built from: wf1-MECH-SCHEDULES-20261019-r10-r6/schedules.json · wf1-EQUIPMENT-SELECTION-20261019-r4/selection.json · apps/api/src/hexanta_api/product/catalogue/records (git) · wf1-DEMO-LONDON-OFFICE-20261020-r4/run-baseline/workbook/HEXANTA_WF1_MECHANICAL_DESIGN_CALCULATIONS.xlsx · wf1-MECH-SCHEDULES-20261019-r10-r6/WF1_P03E_Calculation_Workbook.xlsx
| File | Size | SHA-256 | Open |
|---|---|---|---|
| HEXANTA_WF1_RUN3_Calculation_Workbook.pdf | 4.6 MB | 3583f3e4a4b3 | Download · View |
| HEXANTA_WF1_RUN3_Calculation_Workbook.xlsx | 217 KB | d87c3cb52bb9 | Download |
| HEXANTA_WF1_RUN3_Mechanical_Equipment_Workbook.pdf | 3.4 MB | 8b57ab0edafd | Download · View |
| HEXANTA_WF1_RUN3_Mechanical_Equipment_Workbook.xlsx | 129 KB | 89b89a2f903b | Download |
Run 4 - accepted model (tag wf1-run4-accepted-20261020) (4)
Built from: wf1-MECH-SCHEDULES-20261020-r11-r7-r5/schedules.json · wf1-RUN4-EQUIPMENT-STATUS-20261020-r3/selection.json · wf1-RUN4-EQUIPMENT-STATUS-20261020-r3/levels.json · apps/api/src/hexanta_api/product/catalogue/records (git) · wf1-DEMO-LONDON-OFFICE-20261020-r4/run-change/workbook/HEXANTA_WF1_MECHANICAL_DESIGN_CALCULATIONS.xlsx · wf1-MECH-SCHEDULES-20261020-r11-r7-r5/WF1_P03E_Calculation_Workbook.xlsx
| File | Size | SHA-256 | Open |
|---|---|---|---|
| HEXANTA_WF1_RUN4_Calculation_Workbook.pdf | 9.3 MB | a38199d3746f | Download · View |
| HEXANTA_WF1_RUN4_Calculation_Workbook.xlsx | — | 29c330f9f0b3 | Download |
| HEXANTA_WF1_RUN4_Mechanical_Equipment_Workbook.pdf | 5.5 MB | 666b2eb32350 | Download · View |
| HEXANTA_WF1_RUN4_Mechanical_Equipment_Workbook.xlsx | 217 KB | 58684bbf2a38 | Download |
Stage 5 — Manufacturing and Construction
not automated Interface definition only — Hexanta does not automate this stage. Required inputs: Stage 4 information issued for construction.
| Gate | State | Detail |
|---|---|---|
| Practical completion | not automated | Interface definition only — Hexanta does not automate this stage. |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Requests for information / technical queries | MEP contractor | not automated | Interface definition only — Hexanta does not automate this stage. | |
| Contractor submittals and installation drawing review | building services engineer | not automated | Interface definition only — Hexanta does not automate this stage. | |
| Site inspections and observation reports | building services engineer | not automated | Interface definition only — Hexanta does not automate this stage. |
Stage 6 — Handover
not automated Interface definition only — Hexanta does not automate this stage. Required inputs: installed systems, commissioning plan.
| Gate | State | Detail |
|---|---|---|
| Handover accepted | not automated | Interface definition only — Hexanta does not automate this stage. |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Commissioning and witnessing records | commissioning manager | not automated | Interface definition only — Hexanta does not automate this stage. | |
| As-built (record) drawings and model | MEP contractor | not automated | Interface definition only — Hexanta does not automate this stage. | |
| Operation and maintenance information | MEP contractor | not automated | Interface definition only — Hexanta does not automate this stage. |
Stage 7 — Use
not automated Interface definition only — Hexanta does not automate this stage. Required inputs: asset information, metered data.
| Gate | State | Detail |
|---|---|---|
| Post-occupancy review | not automated | Interface definition only — Hexanta does not automate this stage. |
| Deliverable | Responsible | Status | Detail | Evidence |
|---|---|---|---|---|
| Asset records | facilities manager | not automated | Interface definition only — Hexanta does not automate this stage. | |
| Performance monitoring and in-use evaluation | facilities manager | not automated | Interface definition only — Hexanta does not automate this stage. |