Copyright © 2015 Pearson Education, Inc.Systems Design, Implementation, and Operation Chapter 22 22-1... Learning Objectives• Discuss the conceptual systems design process and the activi
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Systems Design, Implementation, and Operation
Chapter 22
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• 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
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Phase 2: Conceptual Systems Design
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Trang 4Phase 3: Physical Systems Design
• Output design (e.g., reports)
• File and database design
• Input design (e.g., forms, computer screen input)
• Procedures design
• Control design
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Program Design
• Determine user needs
• Create and document development plan
• Write the computer code
• Test the program
• Train users
• Install the system (including components and hardware)
• Use and modify the system
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Trang 6Phase 4: Systems Implementation
• Implementation plan
• Select and train personnel
▫ Development documentation
▫ Operations documentation
▫ User documentation
• Testing the system
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Testing the System
▫ Step by step review
• Processing test data
▫ Test all valid transactions and error conditions
• Acceptance tests
▫ Use copies of real data
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Trang 8Conversion 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)
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Phase 5: Operations and Maintenance
• Conduct post-implementation review
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Trang 10Key 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