The Four Steps to the Epiphany – Successful Strategies for Product that Win

Blank, S. (2013)

Introduced the four-step customer development model.

The first edition (2003) started the “lean startup” approach; with the Business Model Canvas and eventually the Lean Canvas Model flowing from the ideas contained in the customer development model. The book starts with a chapter entitled “The Path to Disaster: The Product Development Model”

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