Page 8 - DCAP205_DCAP409_ANALYSIS_AND_DESIGN_OF_INFORMATION_SYSTEMS

Analysis & Design of Information Systems

Notes 1.9 Keywords
1.10 Review Questions
1.11 Further Readings

Objectives

After studying this unit, you will be able to:

 Understand the concept of information systems development
 Recognize the function of system analyst
 Discuss the system analysis and design

 Understand the categories of information systems
 Discuss the system development strategies
 Understand the implementation and evaluation

Introduction

Most computer-based Information Systems are conceived, designed, and implemented using
some form of systematic development process or methodology. Most methodologies consist of
a finite number of phases. In this unit, you will understand various phases of information
system development. A Systems analyst is a person who is overall responsible for development
of a software. The role of system analyst is discussed in the unit. Also you will understand the
concept of system analysis and design, categories of information systems, system development
strategies, and discuss implementation and evaluation.

1.1 Information System Development

The number of phases in the information system development may vary from methodology to
methodology. Each phase gives an output that becomes input of next phase. Mainly the process
comprises of:

1. Investigation
2. Feasibility Study
3. Analysis

4. Design
5. Implementation
6. Maintenance
This can be represented by a flowchart shown in Figure 1.1.
Each stage of this development process is highly interrelated and interdependent on each other.
The system developer has to perform many activities to accomplish each stage. Sometimes he
has to go back to the previous stage to implement some changes so that a better system will be
there or to produce a better solution to the organization problem or provide the best product to
the users of Management Information System.

Now we take each stage individually and the activities related to each stage and how these
activities are performed.

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