The Tests to Detect & Isolate metrics appear in the Tests to Detect/Isolate a Failure section of the Fault Isolation Report. These metrics describe the total number of tests required to detect and isolate a primary failure using the diagnostic sequence in the current diagnostic study.
Minimum
The Minimum Total Tests is the smallest number of tests needed to detect and isolate a failure using the current diagnostic sequence.
Maximum
The Maximum Total Tests is the largest number of tests needed to detect and isolate a failure using the current diagnostic sequence.
Average
The Average Total Tests is calculated by summing the number of tests needed to detect and isolate each isolated fault group and dividing the sum by the total number of isolated fault groups:
the number of tests needed to detect a failure that can be isolated to the ith isolated fault group
ITi
=
the number of tests needed to isolate a failure to the ith isolated fault group
Expected
The Expected Total Tests is the mean number of tests to detect and isolate a primary failure that would be achieved if the the current diagnostic sequence were to be employed with a fielded system. The metric is calculated by multiplying the number of tests needed to detect and isolate each isolated fault group by the fault group's aggregate failure probability and then summing the results for all isolated fault groups:
