DDLC (Database Development Life Cycle):

It is a procedure for designing, implementing and maintaining database system. It contains of six stages:

1. Preliminary design
2. Feasibility design
3. Requirements definition
4. Conceptual design
5. Implementation
6. Database evaluation and maintenance.

Preliminary Planning- It is the specific database system gets place during a strategic database planning project. After database implementation project begins, general information model produced throughout database planning is reviewed and enhanced if needed. Throughout this process, firm collects information to answer following questions:

1. How many application programs are being used, what functions do they perform?
2. What files are associated with each of the applications?
3. What recent applications, files are under development?