Analysis Overview

You might want to consider performing the following steps in the following order

1. Identify project constituencies
2. Identify actors
3. Capture use cases
4. Convert each use case into analysis classes
5. Identify decision points
6. Synthesize entity classes into logical data items
7. Synthesize decision points and control classes into high level rules

This approach will lead you to design a business object model (BOM) that matches your project needs. In a large enterprise, you may well have to do some mapping to make this business object model match your enterprise executable object model (XOM).