Page 124 - DCAP308_OBJECT_ORIENTED_ANALYSIS_AND_DESIGN

Object Oriented Analysis and Design Mandeep Kaur, Lovely Professional University

Notes Unit 10: System Conception

CONTENTS
Objectives

Introduction
10.1 Devising and Elaboration
10.1.1 Devising a System Concept

10.1.2 Elaboration
10.2 Preparing a Problem Statement
10.2.1 Issues in Complexity Modelling and Abstraction
10.3 Summary

10.4 Keywords
10.5 Review Questions

10.6 Further Readings
Objectives

After studying this unit, you will be able to:
Describe how to devise a system concept
Explain the concept of elaboration
Discuss the concept of preparing a problem statement
Analyse the issues in complexity modelling and abstraction

Introduction

System conception deals with the genesis of an application. Primarily some person, who
understand technology as well as business needs, thinks about an idea for an application. The
intention of system conception is to recognize the big picture, that is, what requirements does
the proposed system meet, can it be developed at a reasonable cost?, etc. System conception is
considered as a requirement analysis phase. Requirements describe how system behaves from
the user’s point of view. True customer requirements should be separated from design decisions.
Solution should be deferred until a problem is fully understood. Requirements statements are
typically ambiguous, incomplete and inconsistent. Some of requirements are plain wrong,
some impose unreasonable implementation cost or may create new problems, if implemented.

10.1 Devising and Elaboration

In this section, we will discuss devising a system concept and the concept of elaboration.

10.1.1 Devising a System Concept

Some ways to find new system concepts:
New functionality: add functionality to existing system

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