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Developing Information Systems: Practical guidance for IT professionals by Pete Thompson, Debra Paul, Alan Paul, Lynda Girvan, Julian Cox, Tahir Ahmed, James Cadle

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8      SYSTEMS DESIGN – 1

Peter Thompson

CONTENTS OF THIS CHAPTER

This chapter covers the following topics:

  • the objectives and constraints of systems design;
  • systems design in the development lifecycle;
  • the scope of design;
  • input and output design, technologies and their application;
  • the objectives and principles of process design.

OBJECTIVE OF SYSTEMS DESIGN

The objective of systems design is to formulate a solution to realise the system requirements. These requirements will typically be categorised as functional or nonfunctional (as explained in Chapter 5). However, there are several additional objectives identified by the manufacturer (in this case, the system developers). Figure 8.1 summarises these objectives.

Functional requirements ...

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