FMEAs help us focus on and understand the impact of potential process or product risks.
- A systematic methodology is used to rate the risks relative to each other.
- An RPN, or Risk Priority Number, is calculated for each failure mode and its resulting effect(s).
The RPN is a function of three factors:
- The Severity of the effect
- The frequency of Occurrence of the cause of the failure
- The ability to Detect the failure or effect
Calculating the RPN
- The RPN = The Severity ranking X the Occurrence ranking X the Detection ranking.
- The RPN can range from a low of 1 to a high of 1,000.
- Develop an Action Plan to reduce risks with unacceptably high RPNs.
Linking FMEAs to Control Plans
- Use FMEAs as the basis for Control Plans.
- Control Plans are a summary of proactive defect prevention and reactive detection techniques.