CHAPTER Systems Analysis and Design

13 © The McGraw-Hill Companies, Inc Objectives Phases of systems life cycle –ID needs and possible solutions –Analyze and evaluate systems –ID, acquire and test systems –Implement new/revise old –Systems audits/periodic evals

13 © The McGraw-Hill Companies, Inc System Analysis and Design Critical to today’s businesses May need to change Problem-solving procedure –Examine system –Improve system if needed

13 © The McGraw-Hill Companies, Inc Steps Preliminary investigation Analysis Design Development Implementation Maintenance

13 © The McGraw-Hill Companies, Inc Phase 1 – Investigation Define problem(s) Suggest alternatives Short summary report

13 © The McGraw-Hill Companies, Inc Phase 2 – Analysis Gathering data Analyze data Document systems analysis

13 © The McGraw-Hill Companies, Inc Phase 3: Design Design alternative system Select best system Write comparative design report

13 © The McGraw-Hill Companies, Inc Phase 4: Development Developing software Acquiring hardware Testing the new system

13 © The McGraw-Hill Companies, Inc Phase 5: Implementation New system installed Types of conversion Training

13 © The McGraw-Hill Companies, Inc Phase 6: Maintenance Ongoing activity Systems audit Periodic evaluation

13 © The McGraw-Hill Companies, Inc Systems Development Alternatives Prototyping RAD

13 © The McGraw-Hill Companies, Inc A Look Into the Future Pace of business rapid Increased use of RAD and prototyping Increased use of outside consulting

13 © The McGraw-Hill Companies, Inc. 2002