Accounting
Information
Systems
9th Edition
Marshall B. Romney
Paul John Steinbart
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-1
AIS Development
Strategies
Chapter 17
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-2
Learning Objectives
1.
2.
3.
Describe how organizations
purchase application software,
vendor services, and hardware.
Explain how information system
departments develop custom
software.
Explain how end users develop,
use, and control computer-based
information systems.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-3
Learning Objectives
4.
5.
Explain why organizations
outsource their information
systems, and evaluate the
benefits and risks of this
strategy.
Explain the principles and
challenges of business
process reengineering.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-4
Learning Objectives
6.
7.
Describe how prototypes are used to
develop an AIS, and discuss the
advantages and disadvantages of
doing so.
Explain what computer-aided
software engineering is and how it is
used in systems development.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-5
Introduction


Ann Christy was elated that the new system
Shoppers Mart (SM) needed was approved.
She needed answers to the following
questions:

Was the software she needed available for
her to purchase? If so, how should she
approach the process of buying hardware
and software and selecting a vendor?
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-6
Introduction



How do companies go about developing
software in house, and is this the best
approach for SM?
How extensively should the system make
use of end-user-developed software?
If the company decided to develop the
system in house, should it try and speed up
the development process by using
prototyping or computer-assisted software
engineering?
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-7
Introduction


Should SM just make the needed
improvements to its existing system,
or should it consider reengineering its
business processes and then develop a
system to support the new processes?
Was outsourcing the information system a
viable alternative to obtaining a new
system? Did the benefits outweigh its
risks?
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-8
Introduction
This chapter discusses three ways
to obtain a new information system:
purchasing prewritten software,
developing software in house, and
hiring an outside company
(outsourcing).
 It also presents ways of speeding
up or improving the development
process.

©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-9
Learning Objective 1
Describe how organizations
purchase application software,
vendor services, and
hardware.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-10
Purchase Software
Canned software is written by
computer manufacturers or software
development companies.
 It is sold on the open market to a
broad range of users with similar
requirements.
 Turnkey systems are a combination of
software and hardware sold as a
package.

©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-11
Purchasing Software
and The SDLC

Companies that buy rather than
develop AIS software still go through
the systems development life cycle
(SDLC).
1.
2.
3.
4.
5.
Systems analysis
Conceptual design
Physical design
Implementation and conversion
Operation and maintenance
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-12
The Systems Acquisition
Process
Investigate
software
packages
Will package
meet needs?
Yes
No
Can package
be modified?
Develop
software
internally
Yes
Send RFP for
software and
hardware
Evaluate
proposal
No
Send RFP for
hardware,
if necessary
Select best
combination
Learning Objective 2
Explain how information
system departments
develop custom software.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-14
Development by In-House
IS Department
In the past, most organizations had
their information system departments
develop custom software, because
canned software that fit their specific
needs was not available.
 Developing custom software is difficult
and error-prone.
 It also consumes a great deal of time
and resources.

©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-15
Development by In-House
IS Department



Custom software is usually developed and
written in house.
Alternatively, organizations may engage an
outside company to develop a package or
assemble it from their inventory of program
modules.
When contracting with an outside
organization, a company should maintain
control over the development process.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-16
Development by In-House
IS Department

What guidelines are recommended?
–
–
–
–
–
carefully select a developer
sign a contract
plan and monitor each step
maintain effective communication
control all costs
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-17
Learning Objective 3
Explain how end users
develop, use, and control
computer-based information
systems.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-18
End-User-Developed
Software


End-user computing (EUC) is the hands-on
development, use, and control of computerbased information systems by users.
When end users began to meet their initial
information needs two things happened:
1
2
Users realized computers could be used to
meet more and more information needs.
Increased access to data created many new
uses and needs for information.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-19
End-User-Developed
Software

What are some examples of end-user
development uses?
–
–
–
retrieving information from company
databases to produce simple reports or to
answer one-time queries
performing “what if” sensitivity or statistical
analyses
developing applications using prewritten
software (spreadsheet or database system)
©2003 Prentice Hall Business Publishing,
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17-20
End-User-Developed
Software
Benefits of End-User Computing
User creation, control, and implementation
Systems that meet user needs
Timeliness
Freeing up IS resources
Versatility and ease of use
End-User-Developed
Software
Risks of End-User Computing
Logic and development errors
Inadequately tested applications
Inefficient systems
Poorly controlled and documented systems
Systems incompatibility
Duplication of systems
Increased costs
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-22
End-User-Developed
Software

Which one is an approach organizations
use to manage and control end-user
computing?
–

help desk
What are some duties of the help desk?
–
–
providing hot-line assistance to help resolve
problems
serving as a clearinghouse for information,
coordination, and assistance
©2003 Prentice Hall Business Publishing,
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17-23
End-User-Developed
Software
–
–
–
–
–
training end users, and providing
corresponding technical maintenance and
support
evaluating new end-user hardware and
software products
assisting with application development
developing and implementing standards
controlling data
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-24
Learning Objective 4
Explain why organizations
outsource their information
systems, and evaluate the
benefits and risks of this
strategy.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-25
Outsource the System

What is outsourcing?


It is hiring an outside company to
handle all or part of an organization’s
data processing activities.
In a mainframe outsourcing
agreement, the outsourcers buy their
client’s computers and hire all or most
of the client’s employees.
©2003 Prentice Hall Business Publishing,
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17-26
Outsource the System

In a client/server or PC outsourcing
agreement, an organization
outsources a particular service, a
segment of its business, a particular
function, or PC support.
©2003 Prentice Hall Business Publishing,
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17-27
Outsource the System
Benefits of Outsourcing
A business solution
Asset utilization
Access to greater expertise and
more advanced technology
Lower costs
Improved development time
Elimination of peaks and valleys usage
17-28
Facilitation of downsizing
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
Outsource the System
Risks of Outsourcing
Inflexibility
Loss of control
Reduced competitive advantage
Locked-in system
Unfulfilled goals
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-29
Learning Objective 5
Explain the principles and
challenges of business
process reengineering.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-30
Business Processes
Reengineering



What is business process reengineering
(BPR)?
It is the thorough analysis and complete
redesign of business process and
information systems to achieve
performance improvements.
It is a process that challenges traditional
organizational values and cultures
associated with underperformance.
©2003 Prentice Hall Business Publishing,
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17-31
Business Processes
Reengineering
BPR reduces a company to its
essential business processes and
focuses on why they are done rather
than on the details of how they are
done.
 It completely reshapes organizational
work practices and information flows
to take advantage of technological
advancements.

©2003 Prentice Hall Business Publishing,
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Principles of Reengineering

What are the seven principles
of business processing
reengineering?
1.
2.
3.
Organize around outcomes,
not tasks.
Have output users perform the
process.
Have those who produce
information process it.
©2003 Prentice Hall Business Publishing,
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17-33
Principles of Reengineering
4.
5.
6.
7.
Centralize and disperse data.
Integrate parallel activities.
Empower workers, use built-in
controls, and flatten the organization
chart.
Capture data once, at its source.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-34
Challenges Faced by
Reengineering Efforts

What are some of the obstacles to
reengineering efforts?
–
–
–
–
–
tradition
resistance
time requirements
lack of management support
risk
©2003 Prentice Hall Business Publishing,
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17-35
Challenges Faced by
Reengineering Efforts
–
–
–
skepticism
retraining
controls
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-36
Learning Objective 6
Describe how prototypes are
used to develop an AIS, and
discuss the advantages and
disadvantages of doing so.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-37
Prototyping

What is prototyping?
–

an approach to systems design in
which a simplified working model of a
system is developed.
A prototype, or “first draft,” is quickly
and inexpensively built and provided
to users for testing.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-38
Prototyping

What four steps are involved in developing
a prototype?
1.
2.
3.
4.
Identify basic systems requirements.
Develop an initial prototype that meets the
agreed-on requirements.
Users identify changes, developers make
changes, and the system is turned over to
the user.
Use the system approved by the users.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-39
Prototyping
Advantages of Prototyping
Better definition of user needs
Higher user involvement and satisfaction
Faster development time
Fewer errors
More opportunity for changes
Less costly
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-40
End-User-Developed
Software
Disadvantages of Prototyping
Significant user time
Less efficient use of system resources
Incomplete systems development
Inadequately tested and
documented systems
Negative behavioral reactions
Unending development
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-41
Learning Objective 7
Explain what computer-aided
software engineering is and
how it is used in systems
development.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-42
Computer-Aided Software
Engineering (CASE)



CASE is an integrated package of
computer-based tools that automate
important aspects of the software
development process.
CASE tools are used to plan, analyze,
design, program, and maintain an
information system.
They are also used to enhance the efforts
of managers, users, and programmers in
understanding information needs.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-43
Computer-Aided Software
Engineering (CASE)


CASE tools do not replace skilled
designers; instead they provide a host of
self-integrated tools that give developers
effective support for all SDLC phases.
CASE software typically has tools for
strategic planning, project and system
management, database design, screen and
report layout, and automatic code
generation.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-44
Computer-Aided Software
Engineering (CASE)
Advantages of CASE Technology
Improved productivity
Improved program quality
Cost savings
Improved control procedures
Simplified documentation
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-45
Computer-Aided Software
Engineering (CASE)
Disadvantages of CASE Technology
Incompatibility
Unmet expectations
©2003 Prentice Hall Business Publishing,
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17-46
Case Conclusion

What did Ann Christy decide?
–

What did she think about prototyping?
–

against outsourcing the AIS
that it would not work well
What did she think about reengineering?
–
that the system did not need reengineering
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-47
Case Conclusion

What were her options?
–

purchase a system or design
one in house.
No matter which approach she
chose, Ann wanted to facilitate as
much end-user development as was
practical and useful.
©2003 Prentice Hall Business Publishing,
Accounting Information Systems, 9/e, Romney/Steinbart
17-48
End of Chapter 17
©2003 Prentice Hall Business Publishing,
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17-49