18-IGCSE ICT1-THE SYSTEM LIFE CYCLE 2

THE SYSTEM LIFE CYCLE

7.3 development and testing

7.4 implementation

7.5 documentation

7.6 evaluation

LEARNING OBJECTIVES

• Testing designs

• Testing strategies

• Improvements needed as a result of testing

• Different methods of system implementation

• Methods of implementation

• Technical documentation for an information system

• User documentation for an information system

• Describe the need to evaluate a solution in terms of the efficiency of the solution, the ease of use of the solution, and the appropriateness of the solution

• Describe the need for a variety of evaluation strategies e.g.

INTRODUCTION

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

7.3.1 Development

After designing, the system should be created and tested fully by the system analysts.

• If the system contains files like database then the file structure would need to be finalized at this stage.

• With the stored correct data and certain techniques, validation routines and verification methods are used to ensure for unwanted data and to make sure that any data transferred from a paper­ based system to an electronic system has been done accurately in this stage.