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How to write an inspection and test plan

An inspection and test plan, or ITP, is the row-by-row schedule of every inspection and test a definable feature of work has to pass, in the order they happen. A good ITP tells the crew what gets checked, what standard it's checked against, who signs it off, and which steps are hard stops. Written well, it turns a specification full of scattered requirements into a sequence the field can actually run. This guide covers how to build one that holds up.

For QC managers and engineers preparing an ITP for a trade package before that work starts on site.

Step by step

  1. List the activities in build sequence

    Walk the feature from first operation to last and write each inspectable activity as its own row — material receipt, layout, rough-in, test, cover, finish. The plan should read in the order the work actually happens.

  2. Pin each activity to its acceptance criteria

    Every row needs the standard it's judged against: the spec section, the drawing detail, the tolerance, or the code family. 'Install per spec' is not criteria — cite the measurable result that means the row passes.

  3. Name the required test and who runs it

    Where a row involves a test — a pressure test, a torque check, a concrete cylinder — state the method, the acceptance value, and who performs and witnesses it. Keep the field role as observe and record where a licensed tech or lab actually certifies the result.

  4. Assign the responsible and verifying parties

    Each row lists who does the work, who checks it (QC), and who else must be involved — the engineer of record, owner's rep, or AHJ. Ambiguity here is what causes a step to close with nobody having actually looked.

  5. Mark hold points and witness points

    Flag the steps that cannot proceed without a sign-off as hold points (H), and the steps where a party is invited to observe but work may continue after notice as witness points (W). State the notice each party is owed.

  6. Define the record each row produces

    Say what proves the row passed — the photos, the test report, the release signature. A row with no defined record is a row you can't demonstrate you ran.

  7. Route the draft for review before work starts

    The ITP is agreed with the owner's rep and, where required, the engineer of record before the feature begins. That's when hold and witness points and notice periods get negotiated, not mid-pour.

What gets missed

  • Copying a generic ITP template without pinning rows to this project's specs, drawings, and tolerances.
  • Writing 'inspect' as a row with no acceptance criteria, so pass or fail becomes an opinion.
  • Confusing hold points with witness points — silence releases a witness point, but never a hold point.
  • Leaving the notice period off witness points, which turns a skipped witness into a dispute later.
  • Forgetting to name the record each row produces, so the plan can't be closed out with evidence.

Hold points vs. witness points

The two point types look similar on the plan but behave differently. A hold point is a hard stop: the crew cannot advance until the named party inspects and releases the work in writing — no sign-off, no progress. A witness point is an invitation: the party is given genuine, documented notice to observe, but if they don't attend within the agreed window, the crew may proceed.

Get the classification right for each step. Put hold points in front of the things you can't undo cheaply — closing a wall, pouring concrete, energizing a feeder. Use witness points where an observation is valuable but a busy inspector shouldn't become the project's bottleneck.

Questions people ask

What's the difference between an ITP and a QC plan?
The quality control plan is the project-wide program — roles, procedures, and how quality is managed. An ITP is the detailed, activity-by-activity checklist for one feature or trade package that lives underneath that plan.
Who signs off the ITP rows?
Each row names its own responsible and verifying parties — typically the installing crew, QC, and any required third party like the engineer of record or AHJ. Hold points add a written release from the named party before work continues.

Terms worth knowing

Checklists that make this a one-tap job

Free, field-ready checklists, each with the photo every item needs before it can be submitted.

ITPInspection and test plan (ITP)Activities, acceptance criteria, hold points and the record per row.11 items8 photosQC planConstruction quality control planRoles, definable features of work, three-phase control, nonconformance.12 items15 photosSteel ITPStructural steel erection ITPDelivery through closeout for structural steel erection, with hold and witness points.10 items10 photosPunch listPunch list templateRoom-by-room closeout items with the before-and-after that closes them.15 items21 photos
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Related guides

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.

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