The Business Model Canvas is a useful tool. These links cover how BMC developers and evangelists explain its value on multiple levels.
It’s more than a planning document. The BMC is a narrative-builder and a tool to begin to understand what makes the most successful startups work. It’s a tool to see the dynamic processes of business development and customer development in motion, but you have to see flows within the BMC, not just little boxes.
The Startup Owner’s Manual defines and explains the processes for customer discovery and validation.
Here’s his dissertation.
Here’s a list of ways to present the BMC from Strategyzer.