Criticality matrix
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In operations research and engineering, a criticality matrix is a representation (often graphical) of failure modes along with their probabilities and severities.
Severity may be classified in four categories, with Level I as most severe or "catastrophic"; Level II for "critical"; Level III for "marginal"; and Level IV for "minor".{{Cite book |url=https://archive.org/details/DTIC_ADA278508/page/26/mode/2up?q=%22criticality+matrix%22 |title=DTIC ADA278508: Failure Mode, Effects, and Criticality Analysis (FMECA) |date=1993 |publisher=Reliable Analysis Center |pages=26–29}}
Example
For example, an aircraft might have the following matrix:
| class="wikitable" border="1" |
| Failure mode
! Severity ! Probability |
|---|
| Collision
| High | Low |
| Engine failure
| High | Low |
| Ice buildup
| Medium | High |