Adherence Compliance is defined as the percent of individual compliance items marked as compliant out of all questions answered.
The Adherence (A) Compliance metric is calculated as
A = c / (c + n)
Where c is the number of checklist questions marked as compliant, and n is the number of checklist questions that were marked as non-compliant.
Here's an example. In the Audit shown below there are 3 checklist fields. Imagine we submitted 2 audits.
Submission 1:
Checklist Field 1 = Yes
Checklist Field 2 = Yes
Checklist Field 3 = Yes
Submission 2:
Checklist Field 1 = No
Checklist Field 2 = Yes
Checklist Field 3 = Yes
The Adherence would be:
A = 5 / (5 + 1)
A = 83%
If we calculated the Defect-Free Compliance (DFC) the same data would be:
DFC = C / (C + N)
Where C is the number of submissions where all checklist items were marked as compliant and N is the number of submissions where at least 1 checklist item was marked as non-compliant.
In our example we have 1 of each. Therefore
DFC = 1 / (1 + 1)
DFC = 50%