Four rounds of changes: making them useful
BIM12 includes four rounds of changes per floor. That allowance is most useful when each round carries a clear, consolidated set of decisions. Organizing feedback does not mean delaying urgent questions. It means giving the modeler a dependable instruction and giving the practice a record of how the floor develops through successive reviews.
Define a round together
Before work begins, agree how a feedback round will be submitted and how its completion will be acknowledged. Confirm which comments belong to which floor and how the current model version will be identified. Discuss the difference between correcting a discrepancy and changing a previously approved architectural decision. If an instruction might expand the original scope, raise that question before work proceeds. The four-round allowance does not remove the need for a shared understanding of the commissioned elements and information depth.
Give every comment a usable location
Collect annotations in one agreed place, with screenshots or marked plans where they clarify the instruction. Refer to a level, room or identifiable element and explain the intended outcome. Replace comments such as fix this area with the dimension, relationship or decision that should govern. Where several people review the same floor, appoint one person to reconcile conflicting instructions. The provider should not have to decide whether the partner's markup or the project architect's later message takes precedence.
Review in a sensible sequence
Use the first review to resolve broad geometry and level relationships before spending attention on naming refinements or minor presentation details. Check repeated rules early so a correction can be applied consistently. In later rounds, verify the changes requested and inspect connected conditions that might also be affected. Keep new design requests clearly labeled and avoid reopening accepted decisions without recording why. This makes the remaining rounds easier to plan and exposes decisions that need internal agreement before another issue is sent.
Prepare a clear change round
- Collect comments from all internal reviewers against the same file issue and reconcile conflicting instructions before asking the provider to revise the floor.
- Give each instruction an identifiable location and expected outcome, distinguishing a changed design decision from a discrepancy against the previously approved modeling brief.
- After delivery, close resolved comments and identify connected conditions needing review, keeping the status visible before another round introduces additional changes or decisions.
After each round, mark comments resolved, awaiting information or carried forward. Retain the file reference against which the feedback was prepared. Four organized rounds can support a disciplined review process, while scattered comments make any allowance harder to manage. The practice gains more control by closing decisions clearly than by measuring progress only through the number of remaining rounds.
General guidance: each project's scope is confirmed before commissioning.