Guides to testing an idea

How to validate a business idea and how to test demand for a product, written for founders who want evidence rather than encouragement.

• How to Test Demand for a Product
  Six ways to measure whether people actually want a product, compared by cost, speed, and how much the resulting signal can be trusted.
• How to Validate a Business Idea
  Most validation advice measures signals that cost the giver nothing. Rank your evidence by what it cost the person who gave it, and the picture changes.