Sutton's Law

Willie Sutton
Taken from Wikipedia

Willie Sutton was Top 10 most wanted figurative of FBI with charges of Bank robbery. Wikipedia says  During his forty-year criminal career he stole an estimated $2 million and eventually spent more than half his adult life in prison.
He is famous for his answer to a reporter who asked him why he does Bank robberies.
he simply answered:  "because that's where the money is." 
This quote is the very basis of Sutton's law. 

This means you should search for the "Obvious" while analysing or diagnosing things.
So, when you are in search of the obvious, you are expected to do those tests in a sequence that would result in the most effective diagnosis or analysis.

An extension of the same in medical parlance is....
When you hear hoofbeats behind you, think horses, not Zebras..

By the way...next time when you take up the task of analyzing a business problem, remember Sutton's law!
Such approaches in a business environment can minimize analysis paralysis