Finding a defect earlier can make correction easier, particularly before another trade covers the affected work. But a claim about savings needs more than a defect count. It needs a credible account of what changed because the issue was found when it was.
Follow the cost of one issue
Start with a confirmed observation. Record when it was found, the affected work and the action taken. Then ask what the next planned activity would have been. A problem corrected before concealment may avoid opening and reinstating finished work, but that avoided work should be assessed by the project team.
Separate the actual repair cost from the estimated cost of a later repair. The first can be supported by work records. The second is a counterfactual and should retain its assumptions. Combining them into one impressive figure makes the estimate harder to review.
Account for the work needed to use the system
Capture time, review time and follow-up all matter. So do equipment, software and operational support. Record these alongside any reduction in manual documentation or repeat visits. Otherwise, an evaluation can move work from one person to another and mistake that shift for a saving.
Use a comparable scope when evaluating alternatives. A detailed review of every accessible room cannot be fairly compared with a short inspection of selected areas without accounting for the difference in coverage.
Avoid double counting
The same issue may appear in multiple images or reports. It may also contribute to several claimed benefits, such as less rework and faster handover. Establish a consistent issue identifier and decide which benefit categories overlap before adding them together.
A useful trial ledger includes the issue, capture date, validation decision, action date, actual repair effort and the basis for any avoided-cost estimate. Record unresolved items too. They show where the workflow has not yet produced an outcome.
Use the trial to make the next decision
The objective is to decide whether to expand, adjust or stop the deployment. Review the evidence with the people responsible for quality and cost. A narrow, defensible result from one repeatable workflow is a stronger basis for expansion than a broad promise of payback that the project cannot reproduce.
