Systems Design, Implementation, and Operation

Presentation on theme: "Systems Design, Implementation, and Operation"— Presentation transcript:

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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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