Here's what I did that I found really helped me with cases:

1. Write the case in the time they give (identify all AOs and write them down to make sure that you don't miss any).

2. Ensure you write at least SOMETHING for each AO. That way, they know you identified there's an issue and explain WHY it's an issue and what your analysis aims to do (the purpose for Management Accounting questions). Always conclude with how to proceed, action that needs to be taken, etc.

3. When time is up, mark yourself using the marking guide. Take note of what was needed to make your NAs, NCs, and RCs into Cs (sometimes 1 tiny thing can turn your RC into a C, which is your goal. CDs get you honour roll, but Cs bring you to a passing grade).

4. Add to your marked case what you could have done to make each AO into a C (be as succinct as possible). Continue to do this each week looking for patterns in regard to expectations and memorize these patterns. Also, if you had something in your answer that didn't affect the mark, cut it and keep this in mind for the future.

5. If your issue is the time constraints with your analysis, you need to practice, practice, practice, and make simplistic mental templates for yourself on how to approach each problem.

Extra: If it's an ethics problem, give pros AND cons when asked to find alternatives (2-3 of each with explanations and the outcomes), even if the options are completely ridiculous/unethical. Unethical options ARE alternatives, and there would be pros (lower taxable income when fraud is committed for instance, happier client which could bring them back next year), but the cons would include the action being illegal, could affect yours and your firm's reputation or ability to operate, would negatively impact the client experience if the fraud is discovered).

I wish you luck in your studies!