What problem are you solving?

• This is the why and it should be stated clearly (not eassy);
• Questions to ask for the problem:
  • Do you experience the problem yourself? This is some indication that this problem exists;
  • Can you define the problem narrowly? Who is the first group of users you can address the problem first? You need to get some first indication of PMF;
  • Is the problem solvable?

Ref:

• Michael Seibel - Building Product