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Chapter 13 introduces you to many of the activities carried out during implementation, including coding, testing, installation, documentation, user training, and support for a system after it is installed. Emphasis on management issues, including change management, organizational politics, and factors for implementation success are presented. Further, chapter 14 presents the process of maintaining information systems and its link with systems development life cycle. The four types of maintenance requests are discussed, and that is corrective, adaptive, perfective, and preventive. After describing the types and costs of maintenance, the chapter describes several managerial issues related to system maintenance and then it concludes by describing the role of CASE tools in systems maintenance.