PPT Slide
How to Construct Data Models
- 1st Step - Entity Discovery
- The first task in data modeling is to discover those fundamental entities in the system that are or might be described by data.
- There are several techniques that may be used to identify entities.
- During interviews or JAD sessions with system owners and users, pay attention to key words in their discussion.
- During interviews or JAD sessions, specifically ask the system owners and users to identify things about which they would like to capture, store, and produce information.
- Study existing forms and files.
- Some CASE tools can reverse engineer existing files and databases into physical data models.