Federation, Coordination & Sign-Off: A Step-by-Step BIM Workflow
Why a Documented Cadence Matters
Multi-disciplinary BIM coordination fails when each discipline operates on its own rhythm. A documented weekly cadence, with named owners and fixed deliverables, eliminates the ambiguity that causes models to drift apart between coordination meetings.
Step 1: Discipline Uploads (Mid-Week)
Each task team uploads their latest WIP model to the CDE Shared area by an agreed cut-off, typically Wednesday end-of-day. Upload includes a short change note: what changed since the last upload, what is intentional, what is in flux. Without this note, reviewers waste hours rediscovering decisions the author already made.
Step 2: Federation and Pre-Review
The BIM coordinator federates the latest discipline models in Navisworks, Solibri, BIM Track, or Revizto on Thursday morning. A pre-review pass identifies obvious issues, missing models, geometry that has clearly broken, scope changes, before the formal coordination meeting. This dramatically reduces meeting noise.
Step 3: Clash Matrix and Issue Triage
Run the clash matrix against the project's clash test definitions: hard clashes, clearance clashes, and tolerance-based interfaces. Triage by severity and owner. Not every clash is a coordination issue, many are tolerance artefacts. The job of the coordinator is to filter signal from noise before the meeting starts.
Step 4: Coordination Meeting (Friday)
The meeting reviews triaged issues, assigns owners, agrees resolution dates, and confirms scope changes. Every issue leaves the meeting with an owner, a due date, and a status. Issues without an owner do not exist. Use a single issue tracker (BIM Track, Revizto, ACC Issues) and keep it as the source of truth, not meeting minutes.
Step 5: Resolution and Re-Federation
Disciplines resolve issues through the following week. Resolved issues are marked with the model revision in which they were fixed, so the coordinator can verify in the next federation. Without this revision link, issues get re-raised and re-resolved in cycles.
Step 6: Stage-Gate Sign-Off
At each stage gate, formally transition the federated model from Shared to Published in the CDE. Sign-off is recorded against named individuals per discipline and per scope. This becomes the contractual baseline for the next stage and the audit trail if a dispute arises later.
Tooling the Workflow
The cadence above can be partially automated: scheduled federation jobs, auto-generated clash reports, dashboards showing open issue counts by discipline and age. The point of automation is not to remove humans, it is to remove the parts of the workflow that humans add no value to, so the meeting time is spent on judgement, not data wrangling.
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