How to debug the coverage miss of bins in a Covergroup?

Coverage
1

How to debug the coverage miss of bins in a Covergroup? Kindly list out the different methods that can be used to achieve it.

2

Step 1. Hire an experienced Verification Engineer.

Just kidding… sort of.

This is a generic question (probably an interview?)
The generic answer might be

  1. Are you trying to collected coverage for something does not exist? Check that your coverage model is correct.
  2. Are random constraints not hitting the values you expect toget coverage? Try a directed test.
  3. Is there a design flaw preventing meeting the coverage goals?