Developing Information Systems

13     MAINTENANCE AND EVALUATION

Alan Paul

CONTENTS OF THIS CHAPTER

This chapter covers the following topics:

• the place of maintenance in the lifecycle;
• corrective, adaptive and perfective maintenance;
• evaluation and types of review;
• the role and selection of metrics for evaluation;
• key performance indicators (KPIs) and service level agreements (SLAs);
• references and further reading.

INTRODUCTION

Most of this book is devoted to the approaches and techniques used to develop a system. However, when the system is handed over for live use, it moves into a new stage – maintenance – and the project itself moves into an evaluation stage. A definition of the evaluation and maintenance stages is:

to recognise the need to evaluate a delivered system ...