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Lecture Accounting information systems (13/e) – Chapter 22: Systems design, implementation, and operation

After studying this chapter, you should be able to: 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. | Systems Design, Implementation, and Operation Chapter 22 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. 22-2 Phase 2: Conceptual Systems Design 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 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 22-5 Phase 4: Systems Implementation Implementation plan Select and train personnel Complete documentation Development documentation Operations documentation User documentation Testing the system Conversion 22-6 Testing the System Walk-throughs Step by step review Processing test data Test all valid transactions and error conditions Acceptance tests Use copies of real data 22-7 Conversion Approaches Direct conversion Terminates the old and begins with the new system Parallel conversion Operate old and new systems for a period of time Phase-in conversion Gradual replacement of old elements with new system elements Pilot conversion Implement a system in a part of an organization (e.g., a branch) 22-8 Phase 5: Operations and Maintenance Conduct post-implementation review 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 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 | Systems Design, Implementation, and Operation Chapter 22 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. 22-2 Phase 2: Conceptual Systems Design 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 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 22-5 Phase 4: Systems Implementation Implementation plan Select and train personnel Complete documentation .