Testing Business Ideas

A field guide for reducing the risk of product ideas through structured experimentation. Bland and Osterwalder catalog 44 experiment types organized across desirability, viability, feasibility, and other categories, providing a practical menu for teams that know they need to validate assumptions but aren’t sure how.

The book’s core argument is that most new product ideas fail not because of poor execution but because teams build things nobody wants. The antidote is systematic experimentation: start with your riskiest assumptions, design cheap tests, gather evidence, and iterate before committing to full-scale development. It pairs well with assumption mapping as a way to prioritize which experiments to run first.