There is this anecdote in the text "Operations Research, An Introduction." by Hamdy Taha, which I consider to be a very good example of picking the right tools

There is this anecdote in the text "Operations Research, An Introduction." by Hamdy Taha, which I consider to be a very good example of picking the right tools for the job. An OR group was hired to fix elevator wait times in an office building. After studying the problem they installed full-length mirrors at the entrance to the elevators. Complaints around elevator service disappeared as people were now engaged in watching themselves and others while waiting.