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

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%