A project manager wants to capture the details of activities he would be doing to enhance the value of the process, including their inputs, outputs, and interfaces with other processes. Which of the following documents would be MOST helpful?

1. Project Management Plan
2. Quality Management Plan
3. Process Improvement Plan
4. Product Management Plan

The correct answer is 3. but i remember for these type of questions it is normally referred to the bigger plan (option 1) since it has all the plans in it. why option 1 is not correct answer here.