Your question is Run Effective Project Post-Mortems. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
A project you led missed its goals or had a significant delivery issue. After the immediate recovery work is done, you want to understand what actually happened, avoid blame, and make sure the same failure does not repeat on the next initiative.
How do you conduct post-mortems and apply past failures to future success?