3. The method of claim 2 wherein α is 0.25.
3. The method of claim 2 wherein α is 0.25. 4. The method of claim 3 and wherein generating a cumulative confidence indicator for multiple per-diagnosis confidence indicators includes generating the cumulative confidence indicator, wherein given a set of failed tests T={T 1 , T 2 , . . . , T t }, the cumulative confidence indicator is defined as: C k = 1 t ⁢ ∑ j = 0 t ⁢ c kj for each component B k , where t is the number of tests that failed, and c kj is the confidence level of B k with respect to test T j .