1. Prepare the case
2. Define what success looks like
Do not move the finish line. Decide what “effective” means before looking at the final result.
3. Verify under real operating conditions
The action was physically implemented.
Not just approved, purchased, emailed or assigned.
Normal operating conditions were tested.
The correction works during ordinary production/service, not only during a demonstration.
Pressure / peak conditions were considered where relevant.
Rush period, high volume, changeover, reduced staffing, delivery window, production peak, etc.
More than one person, shift or cycle was checked where practical.
A standard that works only for the person who designed it is not yet controlled.
Results were compared with the original baseline.
4. Check recurrence and hidden workarounds
The original condition has not recurred during the verification period.
No new workaround is masking the original problem.
Extra labor, manual correction, rework, heroics, temporary equipment fixes, hidden transfers, etc.
Related indicators support the conclusion.
Cost, yield, complaints, downtime, rejects, overtime, safety observations, quality data, etc.
5. Make the system match the correction
Relevant SOPs, work instructions or standards are current.
Training / competency was updated where needed.
Monitoring, forms, maintenance, purchasing or other controls were updated where needed.