22 Systems Design, Implementation, and Operation（课件）- 《会计信息系统英文版》同步教学（人民大学版）

Chapter 22 Systems Design, Implementation, and Operation 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 Systems Development Life Cycle (SDLC) 22-3 System Analysis Conceptual Design Physical Design Implementation & Conversion Operations & Maintenance Conceptual Design Developer creates a general framework for implementing user requirements and solving the problems identified in the analysis phase. Evaluating design alternatives Preparing design specifications Preparing the conceptual systems design report 22-4 Preparing Design Specifications Output How often? What should reports contain? What should reports look like? Should reports be online or hard copy or both? Data Storage What data elements must be stored to produce a report? How they should be stored? What type of file or database should be used? Input Where, when, and how to collect the data? Processing Procedures and Operations 22-5 Physical Design Conceptual designs are translated into detailed specifications that are used to code and test the computer programs. Output File and database Input Program Procedures Controls 22-6 Output Design Determine the nature, format, content, and timing of reports, documents, and screen displays. Types of Output: Scheduled reports Special-purpose analysis reports Triggered exception reports Demand reports 22-7 Program Design Determine user needs. Create and document development plan. Write program instructions (code the system). Test the program (debug for errors). Document the program. Train the users. Install the system. Use and modify the system. 22-8 Procedures and Controls Procedures for who, what, where, why, when: Input preparation Transaction proces