Comment count per PR

App inputs to this metric:

GIT/VCS tools

Use cases:

1. Comments per PR shows collaboration in the team

2. Very high numbers can indicate lack of expertise of author, failed test cases, etc

3. Very high numbers can throw light on issues like high cycle time because PRs might be getting held up with large number of back and forth in a PR review.

Some more References:

https://www.hatica.io/blog/code-review-practices/

You can find this metric under the following dashboards: