A good problem statement is

• Factual: based on actual customer knowledge
• Specific: we can name
  • examples of the customers who have this problem
  • the pain caused by the problem
  • bonus: things these customers do to try to alleviate the pain
• Real:
  • a real person feels this real problem in their real life
  • the pain is real
• Open: the solution is not embedded in the problem statement, so the team has flexibility to address the problem
• Witnessable: if the problem statement were alleviated, you could readily tell based on customer behavior or results