Decision to make
Issue the same symptom timeline, system map, records, access limits, and desired deliverable. Mark evidence learned after an earlier estimate so the information difference remains visible.
Record to build
Create rows for diagnosis, isolation, access opening, removed component, material, connection, support, test, return to service, cleanup, permit, inspection, restoration, exclusion, payment, and warranty.
Question to compare
For concealed piping, damaged surroundings, unavailable parts, or other trades, record the evidence, unit or price method, approval limit, and safe pause. Blank is not the same as included.
Useful closeout
Match the legal company and license to the proposal, then keep the accepted revision with every approved change and final invoice. Do not rely on a sales conversation to modify an older scope.