Personally, I would use the case studies your school gives you. Try to get Australian organisations where possible.
Have a case study for each area of study: Operations Management, Human Resource Management, Social Responsbility etc
For
Operations Management, you will need a
service and a
product organisation, because sometimes they specifically ask for one or another.
For a service organisation, I used Village Cinemas
Product organisation - RipCurl (a really simple and easy one)
For
HRM, I used Rebel Sport about its induction program and Holden for it's remuneration packages.
For
Social Responsibility, I used The Body Shop and Nike.
Also a little confused into how to lead into a case study without getting too off the topic of the question at hand,
As for 'leading into your case study', I'll put up an example of how I would answer a question:
E.g. "Discuss the elements of an operations system. Include a service firm in your answer"
- Define Operations system
- State that Inputs, Processes, Outputs,
- Define Inputs
- Use Village Cinemas here: inputs include electricity, film etc
- Define Processes
-Use Village Cinemas here
-Define Ouputs
- Use Village Cinemas here
You don't necessarily have to 'lead into' a case study, but you can incorporate it within your answer, like I have shown you.