Some commonly used frameworks and mental models that can be applied to gap analysis for solution implementation:

This explains the six core concepts of business analysis. TLDR: The practice of enabling change in an enterprise by defining needs and recommending solutions is to deliver value to stakeholders.

Instead of aimlessly asking questions, identify the key information you need to make a decision. What are the 5 key aspects? Here lists it out

I am using 4Ps frameworks by Ali Abdaal as a base to find out the career satisfaction patterns.