The case prompt is the number of membership in the fitness center has been declining last 5 years, what is the possible cause. I have been suffering from this specific question since I started case interview preparation. I usually break down market share decline into the old and new competitors, then I dig deeper to see whether it is a competition problem. Well, I feel insecure mainly because competition and customer-related reasons are interrelated. That creates lots of confusion. I know that structuring depends on the context, but I just wanna see different ways how one can structure this question
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