17-IGCSE ICT1-THE SYSTEM LIFE CYCLE 1

THE SYSTEM LIFE CYCLE

7.1 analysis

7.2 design

LEARNING OBJECTIVES

Ø Methods of researching an existing system

Ø Recording and analysing information about the current system

Ø System specification

Ø Describe how it is necessary to design documents, files, forms/inputs, reports/outputs and validation

Ø Produce designs to solve a given problem

Ø Design data capture forms and screen layouts

Ø Design report layouts and screen displays

Ø Design validation routines (including length check, type check, format check, presence check, check digit)

Ø Design the required data/file structures (e.g. field length, field name, data type)

INTRODUCTION

System life cycle is necessary to review an existing system and suggest a number of improvements.

There are many stages in systems analysis.

The main stages in the systems life cycle includes analysis, design, development and testing, implementation, documentation and evaluation.