Which changes belong in the log?
Record changes to drawings, schedules, quantities, supplier quotes, labour basis, exclusions, allowances and commercial treatment.
| Change | Record | Review |
|---|---|---|
| Source | Drawing or addendum | Document control |
| Rows | Affected estimate lines | Estimator |
| Basis | Old and new input | Workstream owner |
| Effect | Price or scope effect | Commercial review |
| Status | Approved or open | Bid lead |
How should a changed quantity be explained?
State the source revision and measurement change. Avoid writing only revised total because the reviewer needs to see the reason and affected work package.
- Old value and new value
- Source and revision
- Reason for change
- Downstream actions
- Approval status
When is a change closed?
Close it when the estimate, supplier scope, response and risk records have been updated and the reviewer accepts the new basis.
Common questions
What else should the bid team know?
What should a estimate change log include?
It should show source, affected rows, old and new basis, reason, effect, owner and approval.
Who reviews a estimate change log?
The estimator controls the log while each workstream owner confirms the technical or supplier effect.
Does this page create project quantities?
No. Use the issued drawings, schedules and specifications. The estimator reviews and approves the project basis.
Primary sources
- MasterFormat 2026Construction Specifications Institute
- NFPA 70, National Electrical CodeNational Fire Protection Association
- ANSI/TIA-942 Telecommunications Infrastructure Standard for Data CentersTelecommunications Industry Association
- Tier Standard: TopologyUptime Institute