Table 4. Risk assessment guideline

Rating	Severity of effect	Likelihood of occurrence
10	Hazardous without warning	Very high: Failure is almost inevitable
9	Hazardous with warning
8	Loss of primary function performance	High: Repeated failures
7	Reduced primary function performance
6	Loss of secondary function	Moderate: Occasional failures
5	Reduced secondary function performance
4	Minor defect noticed by most customers
3	Minor defect noticed by some customers	Low: Relatively few failures
2	Minor defect noticed by discriminating customers
1	No effect	Remote: Failure is unlikely