A useful review identifies the first mistaken decision, not just the last visible failure.
Questions to ask
- Was the original assessment supported by enough evidence?
- Were the test location and observation time appropriate?
- Were too many variables changed together?
- Did treatment stop promptly when a problem appeared?
Review sequence
- Reconstruct the timeline.
- Separate immediate causes from underlying process problems.
- Define improvements that can be checked.
- Update the checklist and arrange targeted retraining.
Do not conceal failures or look for a scapegoat. Where a customer's property is involved, prioritise transparent communication and responsible resolution.