PFMEAs should be conducted:
- On all new processes.
- PFMEAs should be conducted throughout the process design cycle beginning in the preliminary design stage.
- Revise the PFMEA in the pilot process stage, revise again in the final design stage, and finalize the PFMEA in the as-built stage.
- Whenever a change is to be made to a process.
- On existing processes.
- Use the Pareto Principle to decide which processes to work on first.
Make your FMEA a living document by adding to it and updating it whenever new information about the design or process develops.
FMEAs should be updated when:
- Product or process improvements are made.
- New failure modes are identified.
- New data regarding effects are obtained.
- Root causes are determined.