Think what biases you could have towards your solution and write each one down. You will be testing these during the next Design Thinking stage. Critical Assumptions and Questions determine whether your solution will succeed or fail. If your critical assumptions are wrong, you would need to re-design the solution (back in the ideate stage) and build a new prototype with a new solution to the problem.
Your assumptions and questions are rooted in your observations from the previous stages – how did you define what the problem is and why do you think your product will solve it.
What did you define as a problem? What assumptions you made about the needs of your target customer? Think of this as a thesis to validate.
Will you be able to build the solution?
Are all the functionalities or your solution possible to implement?
What assumptions did you make about financial part of building and marketing the product? What are your timelines? When do you think you will start earning money? Do you have enough resources to last you before break-even-point (when you reach revenue which covers all total expense). What is the price you want to set for your product/service?
Below the assumptions and questions box you see critical assumptions & questions. In this box, write down which assumptions would make your product fail if they are wrong. For example, if the assumption about cost and business states that you will start earning money in 6 months and you know that that’s the most you can last with your current funds, if this assumption is wrong – you will fail, because if you still don’t have revenue in half a year and no more money left to keep operations – you simply go out of business. That’s why this assumption is critical.