The one Post-it note insight to sum up lean research: If you are going to be lean, you also need to be thinking two (or five) steps ahead. 
 A draft of lean research principles. 1) eliminate extra steps (like doing analysis and synthesis separately). 2) get other people to do your work  -- or better stated, don't do work that has already been done, or is better done by another stakeholder. 3) Combine steps. For us, research notes, once organized, became automatic analysis. 4) Always design with the end goal or deliverable in mind. I think this is a good design principle for any project, no matter how large or long.
 The guiding research Post-It note that was created during early problem framing. The team realized this was the question our ten weeks of research really needed to answer. If we did that, we could declare project victory.
 Funnels are the organizing structure of lean research. The first tier involves finding out what stakeholders know and what is in the common knowledge of the world and group. From there, tier two digs deeper into tier one's most compelling pain points or insights. In tier three and four, tier two's insights lead to early product concept testing, and the answer to your key research question. (The star).
 Best design research lesson ever: "Don't drink a full glass of water" before conducting an hour and half long interview over video. It was also a good reminder to think of everything before settling in for a day of six back-to-back interviews.   Following lean protocol, one team member conducted the interview. The second conducted analysis/took transcripts. The third ran the digital cultural probes of card sorting, experience mapping, or concept A/B testing. 
 Weeks of back-to-back research cycles involved crafting new interview guides and stimulus immediately after synthesizing findings for the last research cycle. Here, Maureen Burns and I have taken over the living room and dining room of our house to cluster insights from our second research cycle into the third research cycle's interview guide and A/B testing drawings. 
 The funnel of lean research keeps appearing in all my design projects. It is an invaluable tool for getting a project from gray area to goal. 
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