Table 1
Scoring system for likelihood of occurrence (O) used in FMEA
Likelihood
Data
Score
Probability
Remote
No known occurrence
1
1/10000
Low
Possible but no data
2–4
1/5000
Moderate
Documented but infrequent
5–6
1/200
High
Documented and frequent
7–8
1/100
Very High
Documented, almost certain
9–10
1/20