Explaining user research process better?

Wondering if anyone has any frameworks or ideas on how to explain your usability analysis and then research plan development process better. I'm noticing I'm very bad at this. I go to the usual doing a heuristic analysis to look at time and completion rates, and then doing a pilot test, stakeholders conversation, developing hypotheses and then doing the testing and iterating. It's just not convincing enough and I usually get told that my process doesn't make sense.

Any set way to do this that I'm missing? Or any resources to look at?