Corrective work should follow the evidence from investigation and the enclosure designer’s approved repair details. A retest plan then determines whether the repaired condition meets the specified requirement and whether the work could have affected neighboring interfaces.
Record the change before the return visit
- Identify the original test location and criterion in the controlled project record.
- Describe the permanent repair or replacement and its approval.
- List doors, panels, filters or services disturbed during the work.
- Agree repeat locations, frequencies, polarizations and reference conditions.
- Identify any construction that changed after the original test.
Compare like conditions
A retest is easier to interpret when the measurement arrangement and enclosure operating condition are documented well enough to reproduce. A changed reference level or a different receiver limitation can change the reported measurement floor. Comparisons should distinguish a confirmed performance improvement from a change in test capability.
Close the original findings explicitly
| Original finding | Retest disposition |
|---|---|
| Measured shortfall | Result after permanent repair and comparison with the criterion |
| Inconclusive observation | Evidence resolving the limitation or continued qualification |
| Untested affected interface | Additional agreed coverage and its result |
| Changed project requirement | Authority-approved revision and its effect on the conclusion |
A repair demonstration or contractor continuity check can support the record but does not replace the required RF acceptance evidence. Where the final result remains limited by the measurement floor, the report should use a defensible qualification rather than imply an exact value.
For investigations preceding retesting, consult the RF leakage investigation guide and the discussion of doors, seams and penetrations.
For an initial scope discussion, request testing using unclassified information only. OSAT documents measured performance; the responsible authority makes acceptance and accreditation decisions.