Chris Johnson, Index
FMECA - Step 3: Assess Criticality

Hazardous without warning Very high severity ranking when a potential failure mode affects safe operation or involves non-compliance with a government regulation without warning.

10

Hazardous with warning Failure affects safe product operation or involves noncompliance with government regulation with warning.

9

Very High Product is inoperable with loss of primary Function.

8

High Product is operable, but at reduced level of performance.

7

Moderate Product is operable, but comfort or convenience item(s) are inoperable.

6

Low Product is operable, but comfort or convenience item(s) operate at a reduced level of performance.

5

Very Low Fit & finish or squeak & rattle item does not conform. Most customers notice defect.

4

Minor Fit & finish or squeak & rattle item does not conform. Average customers notice defect.

3

Very Minor Fit & finish or squeak & rattle item does not conform. Discriminating customers notice defect.

2

None No effect

1

Source: Automobile Industry Action Group.


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