Quick summary
Treat every addendum as part of the working tender package, with a clear record of the requirement, responsible reviewer, pricing impact, and acknowledgement.
01
Build one addendum register
Record the addendum number, issue date, official source, and all attached files.
Record changes to closing, question deadlines, site meetings, or submission instructions first.
Identify drawings, specifications, forms, and workbook sheets that were added, replaced, or withdrawn.
Assign an estimator or reviewer and record whether acknowledgement is required.
02
Reconcile every issued change
Read the complete addendum—not only the cover page or summary.
Compare each revised instruction against the original requirement.
Classify the impact: scope, quantity, price, schedule, risk, security, or submission.
Update the estimate and record who made the change.
Distribute relevant changes to affected subcontractors and suppliers.
03
Run the closing-day sweep
Check the official portal again and explain any apparent gap in addendum numbering.
Confirm the latest replacement files are inside the working package.
Mark superseded files clearly so they are no longer priced.
Confirm every cost-impacting change reached the final price and workbook.
Recheck the required acknowledgement location and method.
Common pitfalls
Keep these visible during review.
- Reading only the addendum cover page.
- Missing an attachment uploaded separately.
- Updating the internal estimate but not the submitted workbook.
- Treating a verbal answer as an issued change.
- Checking email instead of the official procurement source.
Where MESTRE fits
Organize the review. Keep the judgment human.
MESTRE ingests issued addenda and helps reconcile changed requirements against the tender package, with findings kept under supervised review.