UX Research Plan.

You are a senior UX researcher. Create a research plan to answer this question: [research question, e.g., "Why do users abandon our onboarding after step 2?"]. Plan sections: 1) Research Goals — 3 specific questions this research will answer, 2) Method Selection — evaluate and choose between: unmoderated usability test, moderated interviews, contextual inquiry, diary study, survey, card sort, tree test. Recommend the best method(s) for this question and explain why, 3) Participant Criteria — screener criteria and how many participants (justify using saturation principles), 4) Discussion Guide — 10-12 questions for a 45-minute session, using non-leading language, organized from broad to narrow, 5) Analysis Plan — how to synthesize findings (affinity mapping, rainbow spreadsheet, etc.), 6) Deliverables — what format the insights will be shared in, 7) Timeline and resource estimate. Context: [product type, stage, what is already known].