Quality concepts
Validation
Validation confirms that completed work does what it is supposed to do in service, not just that it matches the paper. Where verification asks 'did we build it to spec?', validation asks 'does it actually work?', meaning the drain carries water, the assembly holds the rating, and the system runs under real conditions. It is the check that catches a design or coordination miss that verification alone would pass, because every individual requirement can be met and the thing can still fail to perform.
Run it with the Photo Gate
Waterproofing inspection checklist
12 items · 26 photos required
Why it matters
Work can pass every dimensional and material check and still not perform: a sloped line that meets tolerance but ponds, an assembly built exactly to a detail that turns out to be wrong. Validation is where that gap gets found, before the owner finds it in use.
It ties the field record to intent. A validated result (water tested, function demonstrated, performance observed) proves the installed work serves its purpose, which is what turnover and warranty ultimately rest on.
How it shows up on site
A functional demonstration or field test of completed work: a plumbing system flow-tested, a waterproofing assembly flood-tested, equipment run and observed under real load, with the result recorded and photographed as proof it performed.
Checklists that put validation to work
Free, field-ready checklists, each with the photo every item needs before it can be submitted.
Related terms
- VerificationConfirming that installed work matches the drawings and spec: checking you built the thing right against a stated requirement.
- Functional performance testA scripted test that drives a system through its operating modes to prove it responds the way the sequence of operations requires.
- Commissioning (Cx)The process of verifying that installed systems actually perform the way the design and the owner's requirements intended.
- Acceptance criteriaThe stated, measurable conditions installed work has to meet before it can pass: the yardstick an inspection judges against.
- CalibrationChecking a test instrument against a known reference so its readings can be trusted: the step that keeps a measurement defensible.
- TraceabilityBeing able to tie a piece of installed work back to the material, submittal, inspection and photo that stand behind it.
Knowing the term is step one. Proving it 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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