FMEA (Failure Mode and Effect Analysis)
FMEA is a tool to reduce the risk.
This tool use in Six Sigma as part of
Improve Phase.
How to choose FMEA topic?
Choose topic base on following:
- Critical to Quality(CTQ)
- Voice of Customer(VOC)
- Customer complaint
- Diversion
- Pareto diagram
- Risk analysis
Formula for RPN (Risk Priority Number):
RPN = Severity X Occurrence X Detection
Rule for RPN (Risk Priority Number):
- There is no such rule for RPN number.
- No criteria, what is max or min RPN number.
Base on Max RPN number i.e. 10X10X10 = 1000 (a big number)
Below is proposed as a thumb rule:
If RPN<120, No special focus/ action required to be taken i.e. current controls are sufficient.
- If 120<RPN<250, Required to take actions on these to reduce the RPN to <120 and then review control plan for further improvement.
- If RPN>250, then problem to be solve through use of statistical analysis.
Reference of usefulness of FMEA Methodology:
- In Safety for Risk analysis.
- In IATF 16949:2016 e.g. clause : 4.4.1.2,7.2.3 , 7.5.3.2.2,8.3.2.1,8.3.5.1,8.5.1.1,9.1.1.1,9.2.2.3 , 10.2.3 , 10.2.4
For more details, refer to “A Review: Implementation of Failure Mode and Effect Analysis” in published paper section.
Published Papers
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