Process & workflow
How to run a preparatory phase inspection
The preparatory phase inspection is the meeting held before a definable feature of work begins — the first of the three phases of control. QC, the foreman, and often the owner's rep confirm that the submittals are approved, the right materials are on site, the crew knows the acceptance criteria, and the work they're building on is ready. Its whole job is to catch problems on paper while they're still cheap. This guide walks the prep meeting itself.
For QC managers and superintendents about to start a new trade or feature and running the kickoff quality meeting.
Step by step
Confirm every submittal is approved and current
Pull the approved shop drawings, product data, and samples for the feature. Verify nothing is still pending, rejected, or approved-as-noted with unresolved comments — and that the crew is holding the current revision, not a superseded one.
Verify the delivered material against the approved submittal
Walk the material actually on site and check it matches what was approved — the right product, model, and grade, undamaged and stored correctly. A substitution that slipped through purchasing surfaces here or it surfaces as rework.
Review the acceptance criteria with the crew
Go through the spec sections, tolerances, and drawing details the work will be judged against so the foreman and crew hear them before they build, not after. Where a mock-up or first article applies, confirm it's approved and available as the reference.
Check the preceding work and the surface
Confirm the work this feature builds on is complete, inspected, and ready — the substrate is sound, prior trades are signed off, and any prerequisite tests passed. Building on unready work is a classic source of downstream defects.
Confirm crew qualifications and the means and methods
Verify the crew has the certifications the work requires (welders, for instance) and that everyone agrees on the installation method, sequence, and any environmental limits like temperature or moisture windows.
Log attendance, decisions, and open items with photos
Record who attended, which submittals and standards were reviewed, the material condition, and any items to resolve before work starts. The initial phase shouldn't open until those open items are closed.
What gets missed
- Holding the prep meeting after work has already begun, which defeats the entire purpose of catching problems before the first fastener.
- Reviewing submittals as a list rather than checking the physical material on site matches them.
- Skipping the crew's qualification check on work that requires certified installers.
- Leaving prep open items unresolved and letting the initial phase start anyway.
- Not documenting who attended and what was agreed, so the meeting can't be pointed to later when a question comes up.
Questions people ask
- Who has to attend the preparatory phase inspection?
- At minimum QC and the foreman for the feature; on most projects the owner's rep is invited, and on federal or heavily specified work their attendance may be required. The point is that the people responsible for the work and its acceptance are in the room before it starts.
- How is the prep phase different from a mock-up?
- The prep phase is a review meeting confirming readiness — submittals, material, criteria, surface. A mock-up is a physical full-scale sample built and approved to set the workmanship standard; the prep phase confirms that approved mock-up exists and is the reference.
Checklists that make this a one-tap job
Free, field-ready checklists, each with the photo every item needs before it can be submitted.
Related guides
- How to run a three-phase inspectionRun the preparatory, initial, and follow-up phases of quality control on a definable feature of work so defects surface before they multiply.
- How to track submittals on a projectBuild and run a submittal register that tracks every shop drawing and product data item from log to approval so no feature starts without the right paper.
- How to run a first-article inspection and mock-upInspect the first fabricated item or build the first full-scale assembly in full so the approved sample becomes the standard the whole run is judged against.
Reading the steps is one thing. Proving you walked them is the job.
RTI holds the submit button until every mandatory item is answered and the photos are attached, then chains the record so it can be proven untouched later.