At the end of this chapter you will know the various activities performed in preliminary analysis of system development. And you will able to understand the various techniques used during the software estimation.

Table of contents

3.1 Preliminary Analysis
3.1.1 Request Clarification
3.1.2 Feasibility Study
3.1.2.1 Technical Feasibility
3.1.2.2 Economic Feasibility
3.1.2.2.1 Cost Benefit Analysis
3.1.2.3 Operational Feasibility
3.1.2.4 Legal Feasibility
3.1.3 Request Approval

3.2 Estimation
3.2.1. Lines of code (LOC)
3.2.2 FP Estimation
3.2.3 Empirical Estimation
3.2.3.1 COCOMO

Case study : Library Management system

Self Assessment

Summary

Exercises

In the last two chapters we studies about systems, their components, different types of systems and different system development models. From this session onwards we'll be looking into details of various activities involved in the development of a system.

First stage of any system development is preliminary analysis. Understanding the customer request for the new or improved system is the first activity performed in preliminary analysis. Secondly thinking of possible solutions. After that, each possible solution is looked more carefully and it is ascertained whether that system is practically possible or not. In the end of preliminary analysis all the findings and recommendations for which solution to use, are presented to management, which finally decide whether to accept the proposal or reject it.