I have to complete a 'Case Study Analysis' as part of a job interview for a management analyst position. Any tips?

As part of the interview process, I have an hour to complete a case study analysis. The position is for an auditing company/agency. I've researched some basic case study examples. I believe I completed similar assignments in some MPA courses, but I'm a little rusty so I thought I'd ask for some advice if anyone has ever had to complete something similar?

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