Establish the revision baseline
Begin by freezing the document set used for the current estimate. Record the drawing issue name, issue date, sheet index, specification revision, addenda, and written answers received by the cutoff. A log cannot prove what changed unless its prior basis is identifiable.
Store the source set where reviewers can retrieve it without relying on personal download folders. Create one row for each sheet in the controlled index, including sheets with no apparent change. Capture sheet number, title, prior revision, current revision, issue date, and receipt date.
A complete population makes missing sheets visible. It also prevents a reviewer from assuming that an unchanged revision symbol means the sheet was never checked. Name the estimate version tied to the baseline.
Include the takeoff files, pricing workbook, quote leveling record, and proposal draft that may need adjustment. If several estimates are active, state which one the log controls. Revision work applied to the wrong estimate can be technically correct and still fail the release.
Assign custody of the log and authority to close findings. Document control may confirm issued files, while estimators decide quantity and pricing effects.
Define those roles before review begins. A status such as complete should mean both the source comparison and the estimate response have been checked, not merely that someone opened the drawing.
Compare complete sheet sets
Compare the prior and current sheet as a pair. Revision clouds and deltas are useful starting points, but they are not the entire review. Check titles, general notes, keynote legends, schedules, detail references, and background information.
A reissued sheet may contain an estimating change even when the visible markup is incomplete or absent. Reconcile the current sheet index against the files received. Record added, deleted, renamed, and superseded sheets before examining details.
When a sheet is absent, keep the row open and determine whether it was intentionally removed or missed in transmission. Never treat a missing file as evidence that its previously priced scope disappeared. Follow moved references to their destination.
A plan may replace a local detail with a reference to another discipline, or a schedule may move while its callouts remain. Review both ends of the reference. Otherwise, an estimator may record a drafting change as harmless while overlooking a different assembly, dimension, or responsibility on the receiving sheet.
Use the controlled-source discipline in the construction estimating process. Compare issued files, not screenshots or bidder markups that cannot be traced to an issue. If an informal answer affects pricing, identify it separately and state whether it has been incorporated into an issued document or remains an estimate assumption.
Describe the physical change before pricing it
Write the changed condition in physical terms. State the system, location, old condition, and new condition. A note such as revised plan gives the next estimator no useful direction.
A note that identifies an added partition type on level two, for example, points toward measurable materials, finishes, openings, and interfaces. Separate independent changes that happen to appear under one revision cloud. A room revision may alter walls, ceilings, doors, devices, diffusers, and finishes.
Those effects may belong to different worksheets and bidders. Distinct log lines allow each response to close without hiding unfinished work behind a single overall status. Trace consequences beyond the edited object.
A larger equipment item may change its pad, structural support, access clearance, electrical feeder, controls, piping, insulation, testing, and handling plan. Use project evidence to decide which consequences apply. The log should prompt a complete review without claiming that every possible interface exists on every project.
Record deletions with the same care as additions. Confirm whether related supports, finishes, temporary work, and bidder scope also disappear.
Before deducting cost, find the original estimate line and verify that it was carried. A drawing deletion cannot produce a valid credit for work that was never included in the baseline.
Remeasure affected quantities with a clear boundary
Identify the takeoff area affected by each change and remeasure that boundary from the current source. Avoid applying a guessed percentage to a whole trade when the changed work can be isolated. Preserve the prior quantity, revised quantity, net movement, unit, and takeoff reference so another estimator can reproduce the result.
Check dimensions, counts, types, and locations independently. A schedule may retain the same total count while changing several types, or a plan may move an item without changing quantity but still alter access and installation conditions. Quantity difference alone is not a complete test of estimate impact.
Keep cumulative quantities separate from revision deltas. The estimate needs the current total, while the revision log needs to explain movement from the prior approved basis. Showing both prevents a later reviewer from adding the delta twice or mistaking a full remeasure for newly added work.
When the drawing does not support a firm quantity, document the measurement limit and current treatment. State the area reviewed, missing information, provisional quantity or allowance, estimate location, owner, and closure evidence.
Do not fill uncertainty with false precision. A controlled open value is safer than an exact number whose basis cannot be found.
Reconcile pricing and quotes
Map every material revision line to its estimate response. That response may be a quantity update, labor change, equipment adjustment, subcontractor quote revision, allowance movement, general conditions effect, or documented no-cost finding. Include the worksheet or cost-code reference.
A reviewed drawing with no estimate destination remains an unfinished task. Send bidders a controlled change description with the applicable revised documents. Ask them to identify additions, deductions, exclusions, and schedule or access effects.
Preserve their response with the log. A replacement quote should not erase the earlier proposal because the comparison is needed to explain scope and price movement. Level revised quotes against the same boundary used for the baseline.
Determine whether the vendor repriced only the change or submitted a new total, and whether prior qualifications still apply. Reconcile taxes, freight, equipment, labor, alternates, and exclusions before posting a difference. Subtracting unlike totals can create a convincing but unsupported adjustment.
Check indirect consequences separately. A design change may affect supervision duration, temporary access, protection, hoisting, testing, or sequencing even when direct quantities are clear.
Include only effects supported by the project information and the team’s estimate basis. Record the reasoning so a reviewer can distinguish a deliberate response from a generic contingency.
| Log field | Evidence | Closure test |
|---|---|---|
| Source pair | Prior and current issued sheet identifiers | Both files match the controlled indexes |
| Physical change | System, location, old condition, and new condition | Scope can be measured without guesswork |
| Quantity response | Prior, revised, and net quantity with takeoff reference | Delta is reproducible |
| Pricing response | Quote, build-up, allowance, or no-cost basis | Adjustment reaches the estimate |
| Open control | Owner, action, due point, and current treatment | Finding is closed or disclosed before release |
Control open findings through release
Give each unresolved effect a named role, next action, due point, and closure evidence. Open is not a pricing strategy. The log must also state what the current estimate carries while the answer is pending.
That may be a supported assumption, an allowance, a retained baseline value, or another treatment permitted by the bid requirements. Group status by the actual work path: source verified, scope interpreted, quantity updated, pricing reconciled, estimate posted, and peer review closed. A single completed checkbox can conceal a missing step.
Specific status fields let the team concentrate on the unfinished part without repeating the entire comparison. Connect material assumptions and unresolved changes to the basis of estimate. The detailed calculation belongs in the log and supporting files, while the basis explains the governing document set and significant pricing treatment.
Ensure the proposal, qualifications, and alternates do not contradict either record. The AACE International resources cover cost engineering practice.
Project documents remain the authority for each estimate. Use consistent identification and revision control so a source can be located and its estimating response can be audited.
Perform the release check from source to total
Select high-effect changes and trace them end to end. Open the issued sheet, verify the described condition, reproduce the quantity delta, inspect the pricing evidence, find the estimate entry, and confirm that it reaches the summary. Then sample unchanged and no-cost rows to make sure those conclusions have evidence rather than default status labels.
Review deleted and superseded sheets as a separate population. Confirm that valid scope was transferred, removed, or retained intentionally. Check that old takeoff overlays and quote references cannot silently feed the current estimate.
Superseded files may remain in the archive, but their labels and storage should prevent accidental use. Reconcile the sum of posted revision adjustments to the movement between approved estimate versions. Differences may be valid when unrelated corrections occurred, but each difference needs an explanation.
This control detects unposted log items, duplicate entries, and estimate changes that bypassed the revision review. Freeze the approved log with the source index, takeoff evidence, pricing responses, estimate version, and proposal package.
Record August 18, 2026 as the publication date for this guide, while project logs use their own true issue dates. A sound handoff lets the next reviewer identify what changed, how cost responded, and which issues remain open without oral history.
