Stage 01 · Idea

At the idea stage, make the problem clearer.

An idea is a hypothesis about a customer and a better way to help them. Your next milestone is credible evidence of the problem, not a complete product.

Read the validation guide

What this stage means

You have an opportunity in mind, but the customer, urgency, delivery approach, or business model remains uncertain. Separate what you have observed from what you hope will be true. A slide deck can organize the idea, but it cannot answer those uncertainties.

What to work on next

Identify people who experience the problem and investigate recent examples. Understand existing alternatives and who makes decisions. Choose a small experiment that could change your mind.

  • A problem statement with a specific customer and situation.
  • Interview notes focused on behavior and workarounds.
  • A list of the riskiest assumptions.
  • One test with an owner, time window, and decision rule.

Useful support and measures

Look for customer discovery guidance, early entrepreneurship learning, and relevant domain expertise. Track what you learned and which assumptions changed. Plan the resources needed for the next experiment; avoid treating fundraising as a substitute for understanding the problem.

Questions, answered.

Should I build before speaking to customers?

A sketch or small prototype can support a conversation, but choose the least work needed to test the current uncertainty. Do not assume a large build is required to investigate the problem.

Sources & further reading

Y Combinator · Startup School

Sources reviewed 2026-09-13. Provider terms may change.