It might be to answer a specific question.
Or to prepare for questions you haven't found yet.
It might be to claim priority on an exciting new result.
Or to check someone else's.
It might be to verify that a process went right.
Or to determine how it went wrong.
It might be to give the data to someone else.
Or to throw it away as soon as you take a peek.
The answer determines what data you collect and how you organize it.
If you're not happy with how that's being done, maybe you had a different answer to the question.