Analyzing the Current Database

Why Analyze

To find out Does the current database support

the organizations current needs Are there structural problems How does the database need to

change What kind of data does the

organization use How does it manage and maintain

that data

Types of Databases

Paper based—file systems Legacy databases Human knowledge

Key Rule

Do not adopt the current database structure as the basis for the new database structure

Conducting the Analysis

Three steps1. Review the way the data is

collected2. Review the manner in which the

information is presented3. Conduct interviews with users and

management

Process

Collect samples of paper forms and reports, also get screen shots of computer forms and reports

In the interviews ask users and managers about the forms and reports, to make sure you understand what each piece of information represents. Look for subjects or themes

(Entities) Look for characteristics (Attributes)

Interview Topics Types of data currently used How users use that data The samples of forms and

reports, clarification of data and details

Types of information required for daily work

Additional Information requirements (things that they may not be getting currently)

Future information requirements

List of Fields

Review and refine the list of characteristics

Determine whether there are new characteristics in any of the samples

Review value lists Review your list of

characteristics with users and managers