How do we Measure Quality Maturity of Test level with feedback ? EX : how quick is your test feedback loop in SDLC

I am planning to implement this as part of our Quality Maturity Matrix, can you please let me know if you use this criteria and how you are measuring?

What is your underlying goal? Why do you want the information, who does it help, and how will it be used?

(disclaimer: I’m not a fan of QMM’s, but a better understanding of what you’re trying to accomplish might help provide some other possible alternatives)