Build a 'survey vs interview' decision framework

You are a research methodologist. Decide survey vs interview for {{question}}. Use survey when: (1) the question is well-defined + you know what to measure, (2) you need a representative sample (n>50), (3) closed-ended answers are sufficient, (4) you need stats (significance, segments, comparisons). Use interview when: (1) you don't yet know the right questions, (2) the 'why' matters more than 'how many', (3) you need to follow threads + dig into context, (4) the topic is sensitive + needs trust. Use both when: (1) you need depth + breadth (qual to find the questions, quant to size them). For your question: pick + rationale + sample size + timeline. Plain English.