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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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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 ...

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