In my recent post on lessons learned launching a lean startup accelerator I made reference to another kind of hackathon — the Business Model Hackathon — as a tool we’ve used to vet entrepreneurs, find interesting people and learn. Brainstorm shifts in the target market / customer segment. Start with an idea.

When Bob Dorf and I wrote the Startup Owners Manual we listed a series of Customer Development principles. Not All Startups Are Alike.