Now take one of your riskiest assumptions in Step 2 and build a prototype to test.

Let’s say you’re building a Gmail alternative that charges users $30/month to send emails (think Superhuman).

Your riskiest assumption might be:

• Will people want to pay this price to access features XYZ?

Next, choose the right prototype:

• mockup
• low/high fidelity prototype
• single-feature MVP
• proof of concept
• minimal viable product (MVP)