What level of workforce planning detail for large research university?

Summary: Seeking best practices for workforce planning in higher education.

We are a large public research university that is in the process of designing our EPM environment. We want to know what level of workforce planning detail is considered best practice for higher education as an industry. How are other colleges and universities planning in workforce? Are you planning by individual employee or some other level? How do you handle split funded employees? Please include information about the size of your institution for context if you can.