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Total Functions Detected Algorithmn

Description
 
The Total Function Detected is the percentage of used functions that are proven / detected by the detection sequence in the given diagnostic study. Although two Test limits are calculated for this metric (see minimum and maximum fault detection), only one number is used when both Test limits are the same (otherwise, this metric is presented as a range). This calculation is not probability-weighted and therefore does not reflect the expected frequency that a malfunction will be detected in a fielded system (the probability-weighted equivalent of this metric is the Total Probability Detected).
 
Calculation
This Test limit is calculated by dividing the number of proven / detected functions in the specified Diagnostic Scope by the total number of functions.
When fault detection is calculated across the entire design (i.e., the Diagnostic Scope is set to <Entire Design>), this metric can be calculated using the following equation:
where
N
=
the total number of used functions (for the current hierarchical expansion)
Xi
=
1 if the ith function is fully proven / detected by the set of detection tests;
0 otherwise
 
When fault detection is calculated with the Diagnostic Scope restricted to a specific Operating Mode, then this metric is calculated as follows:
where
N
=
the total number of used functions (for the current hierarchical expansion)
Xi
=
1 if the ith function is fully proven / detected by the set of detection tests
(this will only happen for functions in the specified Diagnostic Scope);
0 otherwise
Si
=
1 if the ith function is in the Operating Mode specified by the Diagnostic Scope or if the Scale Statistics to Scope option has been disabled; 0 otherwise
 
Standards, Handbooks and Publications
The following Standards, Handbooks and Publications provide information about this and/or similar metrics:
Metric
Standard
Percentage of Detection
IEEE 1522 (2004)