Copyright © 2012 The McGraw-Hill Companies, Inc.. McGraw-Hill Chapter 13: Systems Analysis and Design Analysis and Design... Copyright © 2012 The McGraw-Hill Companies, Inc.. Copyright
Trang 1Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
McGraw-Hill
Chapter 13: Systems Analysis and Design Analysis and Design
Trang 2Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-2 McGraw-Hill
Competencies (Page 1 of 2)
• Describe the six phases of the
systems life cycle.
• Identify information needs and
formulate possible solutions.
• Analyze existing
information systems and
evaluate the feasibility
of alternative systems.
Trang 3Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-3 McGraw-Hill
Competencies (Page 2 of 2)
software and hardware.
to a new one with minimal risk.
evaluations
development.
Trang 4Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-4 McGraw-Hill
Introduction
with an information system of some kind.
and use the system requires
thought and effort.
about a six step process
for performing systems
analysis and design.
Trang 5Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-5 McGraw-Hill
System Analysis and Design
• Six-phase problem-solving procedure
for examining and improving an
information system
Trang 6Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-6 McGraw-Hill
Phase 1: Preliminary Investigation
• The preliminary investigation
determines the need for a new
information system
Trang 7Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-7 McGraw-Hill
Phase 2: Systems Analysis
• Data is collected about the present
system and then analyzed to
determine the new requirements
Trang 8Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-8 McGraw-Hill
Analyzing the Data in Phase 2
Trang 9Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-9 McGraw-Hill
Data Analysis Tools in
Flowchart
Decision Table
Data Flow Diagram
Trang 10Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-10 McGraw-Hill
Phase 3: Systems Design
• Now define the alternatives, select
the best system, and write a systems design report
• Evaluate systems according to
economic feasibility, technical feasibility,
and operational feasibility
Trang 11Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-11 McGraw-Hill
Phase 4: Systems Development
• In the development phase, you
acquire the software and hardware,
and test the new system
Trang 12Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-12 McGraw-Hill
Phase 5: Systems Implementation
the old system to the new one, complete
with training
pilot, and phased
Trang 13Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-13 McGraw-Hill
Phase 6: Systems Maintenance
ongoing activity that includes a systems
audit
and a periodic evaluation
Trang 14Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-14 McGraw-Hill
Applications Development
• Alternatives to the systems life cycle
may be used if the system is not
feasible
– Prototyping is building a model – Rapid applications development
(RAD)
Trang 15Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-15 McGraw-Hill
Careers in IT
systems, following the systems life cycle
in Computer Science or
Information Systems and
technical experience
salary of $54,500 to $87,500
Trang 16Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-16 McGraw-Hill
A Look to the Future
– To stay competitive with today’s
fast business pace, new technologies must be incorporated
– Increased use of RAD
and prototyping
– Increased use of
outside consulting
Trang 17Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-17 McGraw-Hill
Open-Ended Questions
(Page 1 of 2)
of the systems life cycle? Why do
corporations undergo this process?
phase? What is top-down analysis? How is it used?
Trang 18Copyright © 2012 The McGraw-Hill Companies, Inc All rights
reserved.
: M
13-18 McGraw-Hill
Open-Ended Questions
(Page 2 of 2)
Which is the most commonly used?
occur?
they be used by corporations?