Each business have different KPIs, and eventually you
need to target your questions according to that. What you
might need is user requirements questionaire? Going
through the existing reports that business users use will
give u a basic idea of what they are expecting and will
eventually generate more KPIs.
Check if the company has something like a dashboard used
in any other departments, that might help you too.
last, try searching in google, where you find some KPIs
relevant to each industry but not a complete set of
questions.
teccum.