Accounting Essay 2 pages must answer all questions
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romney_ais14_stppt_22.pptxAccounting Information Systems
Fourteenth Edition
Chapter 22
Systems Design, Implementation, and Operation
Copyright © 2018 Pearson Education, Inc. All Rights Reserved
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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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 process and the activities in this phase.
Discuss the systems conversion process and the activities in this phase
Discuss the systems operation and maintenance process and the activities in this phase.
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Phase 2: Conceptual Systems Design
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Chapter 22: Systems Design, Implementation, and Operation
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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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 design
Control design
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Program Design
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
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Phase 4: Systems Implementation
Implementation plan
Select and train personnel
Complete documentation
Development documentation
Operations documentation
User documentation
Testing the system
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Testing the System
Walk-throughs
Step by step review
Processing test data
Test all valid transactions and error conditions
Acceptance tests
Use copies of real data
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Systems Conversion
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)
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Phase 5: Operations and Maintenance
Conduct post-implementation review includes answering these questions:
Does the system meet the organization’s goals?
Are user’s satisfied?
Were expected benefits achieved?
Were actual costs inline with expected costs?
Is the system reliable?
Does the system produce accurate and complete data and on a timely basis?
Is the system compatible with existing systems?
Is the system safeguarded from errors, fraud, and intrusion?
Are there adequate error-handling procedures in place?
Is everyone trained to use the new system?
Is systems documentation complete and accurate?
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Key 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
Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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Copyright © 2018 Pearson Education, Inc.
Chapter 22: Systems Design, Implementation, and Operation
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