Tim Berry (Founder of Palo Alto Software) taught me a lot about business planning being an ongoing process of testing.

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More specifically, rather than provide a long manifesto of the theory behind lean startup, Udacity breaks down the process of launching a business into practical steps for systematically testing hypotheses and developing a business plan that will actually work.

FORBES: The Formula For Entrepreneurial Success Defined

The food trucks are currently racing to get up and running, having already undergone a rigorous testing process that included a presentation of their business plan, a proposed theme and menu, and a cook-off.

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Customer-development process, meanwhile, provides a real-world way of testing the business plan's various hypotheses, as written in the canvas' nine blocks.

ECONOMIST: Innovation