What are your five favourite testing questions?

@j19sch’s article My five favorite testing questions is brilliant.

It offers a solid set of questions that Joep often uses as part of his testing toolbox.

  1. What if there are zero, one, many, lots of this thing?
  2. How would this work for the user?
  3. What about time?
  4. What can I discover by interacting with it?
  5. What do you mean by ?

Read the article for more info and how they help.

How about you, what five questions do you tend to use as part of your testing efforts?

What happens if I do this?
What is the impact going to be if it doesn’t work?