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 ID: 725252
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Systems Design, Implementation, and Operation
Chapter 22
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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.
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Phase 2: Conceptual Systems Design
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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 designControl design22-4Slide5
Program Design
Determine user needsCreate and document development plan
Write the computer code
Test the program
Document the programTrain usersInstall the system (including components and hardware)Use and modify the system22-5Slide6
Phase 4: Systems Implementation
Implementation planSelect and train personnel
Complete documentation
Development documentation
Operations documentationUser documentationTesting the systemConversion22-6Slide7
Testing the System
Walk-throughsStep by step review
Processing test data
Test all valid transactions and error conditions
Acceptance testsUse copies of real data22-7Slide8
Conversion Approaches
Direct conversion
Terminates the old and begins with the new system
Parallel conversion
Operate old and new systems for a period of timePhase-in conversionGradual replacement of old elements with new system elementsPilot 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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Key Terms
Conceptual design specificationsConceptual systems design report
Scheduled report
Special-purpose analysis report
Triggered exception reportDemand reportStructured programmingDebuggingProgram maintenancePhysical systems design reportSystems implementationImplementation planWalk-throughProcessing test dataAcceptance testConversionDirect conversionParallel conversionPhase-in conversionPilot conversionPost-implementation reviewPost-implementation review report
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