How Do You Evaluate Performance Using the Balanced Scorecard in an IT Company?

I need your expert advice on the Balanced Scorecard Appraisal System. I understand that it depends on four parameters:
1. Financial,
2. Internal Process,
3. Customer Feedback, and
4. Leadership and Innovation.

However, I need more detail on evaluating the performance and also what points we can cover if we wish to design the BSC for an IT company.