Accounting information system an overview 9e bodnar and hopwood 2015 chapter 22
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Systems Design, Implementation, and Operation
Chapter 22
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Learning Objectives
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Discuss the conceptual systems design process and the activities in this phase.
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Discuss the physical systems design process and the activities in this phase.
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Discuss the systems implementation and conversion process and the activities in
this phase.
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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
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Output design (e.g., reports)
File and database design
Input design (e.g., forms, computer screen input)
Program design
Procedures design
Control design
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Program Design
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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
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Phase 4: Systems Implementation
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Implementation plan
Select and train personnel
Complete documentation
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Development documentation
Operations documentation
User documentation
Testing the system
Conversion
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Testing the System
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Walk-throughs
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Processing test data
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Step by step review
Test all valid transactions and error conditions
Acceptance tests
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Use copies of real data
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Conversion Approaches
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Direct conversion
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Parallel conversion
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Phase-in conversion
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Pilot conversion
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Terminates the old and begins with the new system
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Operate old and new systems for a period of time
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Gradual replacement of old elements with new system elements
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Implement a system in a part of an organization (e.g., a branch)
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Phase 5: Operations and Maintenance
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Conduct post-implementation review
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Key Terms
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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
Copyright © 2015 Pearson Education, Inc.
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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
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