Systems Design, Implementation, and Operation Chapter 22 Copyright © 2015 Pearson Education, Inc 22-1 Learning Objectives • Discuss the conceptual systems design process and the activities in this phase • Discuss the physical systems design process and the activities in this phase • Discuss the systems implementation and conversion process and the activities in this phase • Discuss the systems operation and maintenance process and the activities in this phase Copyright © 2015 Pearson Education, Inc 22-2 Phase 2: Conceptual Systems Design Copyright © 2015 Pearson Education, Inc 22-3 Phase 3: Physical Systems Design • • • • • • Output design (e.g., reports) File and database design Input design (e.g., forms, computer screen input) Program design Procedures design Control design Copyright © 2015 Pearson Education, Inc 22-4 Program Design • • • • • • • • Determine user needs Create and document development plan Write the computer code Test the program Document the program Train users Install the system (including components and hardware) Use and modify the system Copyright © 2015 Pearson Education, Inc 22-5 Phase 4: Systems Implementation • • • Implementation plan Select and train personnel Complete documentation ▫ ▫ ▫ • • Development documentation Operations documentation User documentation Testing the system Conversion Copyright © 2015 Pearson Education, Inc 22-6 Testing the System • Walk-throughs ▫ • Processing test data ▫ • Step by step review Test all valid transactions and error conditions Acceptance tests ▫ Use copies of real data Copyright © 2015 Pearson Education, Inc 22-7 Conversion Approaches • Direct conversion • Parallel conversion • Phase-in conversion • Pilot conversion ▫ Terminates the old and begins with the new system ▫ Operate old and new systems for a period of time ▫ Gradual replacement of old elements with new system elements ▫ Implement a system in a part of an organization (e.g., a branch) Copyright © 2015 Pearson Education, Inc 22-8 Phase 5: Operations and Maintenance • Conduct post-implementation review Copyright © 2015 Pearson Education, Inc 22-9 Key Terms • • • • • • • • • • Conceptual design specifications Conceptual systems design report Scheduled report Special-purpose analysis report Triggered exception report Demand report Structured programming Debugging Program maintenance Physical systems design report Copyright © 2015 Pearson Education, Inc • • • • • • • • • • • • Systems implementation Implementation plan Walk-through Processing test data Acceptance test Conversion Direct conversion Parallel conversion Phase-in conversion Pilot conversion Post-implementation review Post-implementation review report 22-10 ... Install the system (including components and hardware) Use and modify the system Copyright © 2015 Pearson Education, Inc 22- 5 Phase 4: Systems Implementation • • • Implementation plan Select and train... process and the activities in this phase • Discuss the systems operation and maintenance process and the activities in this phase Copyright © 2015 Pearson Education, Inc 22- 2 Phase 2: Conceptual Systems... old and begins with the new system ▫ Operate old and new systems for a period of time ▫ Gradual replacement of old elements with new system elements ▫ Implement a system in a part of an organization