Equipment Criticality Assessment & Risk Priority Number (RPN)
Prioritize maintenance based on failure consequence and probability
Click a cell in the matrix OR use the sliders to set Severity and Probability. The Risk Score = Severity × Probability. For FMECA analysis, include Detection to calculate the full RPN.
| 1 | Insignificant - No impact on operations, minor inconvenience |
| 2 | Minor - Small production delay, minor repair costs |
| 3 | Moderate - Partial shutdown, moderate repair, minor injury risk |
| 4 | Major - Significant downtime, expensive repair, serious injury risk |
| 5 | Catastrophic - Complete shutdown, major damage, fatality risk |
| 1 | Rare - Unlikely during asset lifetime (<1% per year) |
| 2 | Unlikely - Could happen but not expected (1-10% per year) |
| 3 | Possible - Has happened before (10-25% per year) |
| 4 | Likely - Expected to happen (25-50% per year) |
| 5 | Almost Certain - Will happen without intervention (>50%) |
| 1 | Obvious - Failure preceded by clear warning signs |
| 2 | Easy - Detectable with basic inspection or monitoring |
| 3 | Moderate - Requires routine PdM (vibration, oil analysis) |
| 4 | Difficult - Requires advanced diagnostics or disassembly |
| 5 | Undetectable - No practical method to predict failure |
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