贴一个FMEA的过程：
General Steps in the FMEA
1. For each Process Step, list ways that it can vary or go wrong
(Failure Modes)
2. Identify Effects associated with each Failure Mode
3. List all Causes for each Failure Mode
4. List the Current Controls for each Cause
5. Create Severity, Occurrence, and Detection rating scales
6. Assign Severity, Occurrence and Detection ratings by going
down the FMEA in each of these columns.
7. Calculate the risk priority number for each potential Failure mode
scenario
8. Determine recommended actions, with responsible parties
assigned and estimated date of completion, to reduce High RPNs
- Estimate effect of Actions on RPN (PSEV, POCC, PDET).
9. Take appropriate actions and re-calculate all RPNs
简单说就是列出各种可能的failure mode以及其发生的概率、危害性，得出一个量化的数据(RPN)，然后找解决办法减小或消除其危害性，重新计算RPN。
主要因素是错误类型、概率、影响，导致错误的原因 |
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