15-07-2014, 02:52 PM
System DevelopmentLife Cycle (SDLC)
System.ppt (Size: 349.5 KB / Downloads: 264)
Preliminary Investigation
Determine if a new system is needed
Three primary tasks:
Define the problem
By observation and interview, determine what information is needed by whom, when, where and why
Suggest alternative solutions
Prepare a short report
System Analysis
In depth study of the existing system to determine what the new system should do.
Expand on data gathered in Phase 1
In addition to observation and interviews, examine:
Formal lines of authority (org chart)
Standard operating procedures
How information flows
Reasons for any inefficiencies
System Design
Uses specifications from the systems analysis to design alternative systems
Evaluate alternatives based upon:
Economic feasibility - Do benefits justify costs?
Technical feasibility - Is reliable technology and training available?
Operational feasibility - Will the managers and users support it?
Maintenance
Evaluation Methods
Systems audit - performance compared to original specifications
Periodic evaluation - “checkups” from time to time, modifications if necessary