P-F Curve
Reliability
P-F Curve
Potential Failure to Functional Failure Curve
Model showing the interval between the first detectable sign of deterioration and functional failure.
Examples
- 01The P-F curve for a motor bearing shows that vibration rises about 3 months before failure, heat about 2 weeks before, and noise only days before.
- 02Before choosing a monitoring method for critical fans, reliability engineering reviews the P-F curve to see which signal gives the earliest warning.
- 03Using the P-F curve, the team switches from monthly temperature checks to vibration monitoring, catching problems weeks earlier.