System maintenace , software maintenance

System maintenance involves servicing, maintaining and improving functional information system through its lifetime. System operation and support occur in parallel.

1. S Y S T E M M A I N T A I N A N C E

2. I n t r o d u c t i o n System operation is the ongoing function in which the system operates until it’s replaced with a new system . System maintenance involves servicing, maintaining and improving functional information system through its lifetime. System operation and support occur in parallel.

3. T E R M I N O L O G Y : NO . WORD DEFINITION 1 Configuration Management Assuring for authorized changes made to a system . 2 Corrective Maintenance Changes made to system to repair flaws in its design, coding or implementation . 3 Perfective Mainte n ance Changes made to a system to add new features/improve performance 4 Preventive Maintenance Changes made to a system to avoid possible future problems 5 System Maintenance Changes made to a system to fix its functionality . 6 System Support Technical support for users, omission of new requirements needed to a system.

4. System maintenance consists of following sections: Types of maintenance Conducting and managing maintenance

5. T y p e s O f M a i n t e n a n c e There are several types of maintenance available for the information system. Maintenance is a changes made to an information system to fix or enhance its functionality (Hoffer et. al., 2005). There are four types of maintenance : Corrective Maintenance Adaptive Maintenance Perfective Maintenance Preventive Maintenance

6. C o r r e c t i v e M a i n t e n a n c e Corrective maintenance refers to changes made to repairs the defects in the design, coding or implementation of the system. It diagnoses and corrects errors in an operational system. When corrective maintenance problems occurred, it needs to be repaired and resolve as soon as possible . Examples incorrect report title, incorrect report total and wrong format for report

7. A d a p t i v e M a i n t e n a n c e It is based on business needs and provide enhancement to a system. It’s different with corrective maintenance, because adaptive maintenance is less urgent since business and technical changes may occur over some period of time. The needs occurs when change in the organization such as new products or services, new technology, or introduce of a web-based system. It’s only a small part of an organization’s maintenance effort, it’s not urgent but it’s add values to organizations.

8. P e r f e c t i v e M a i n t e n a n c e It improves a system efficiency, reliability or maintainability . Normally, it comes from users when they submit a request then the support team will initiate a perfective maintenance. When users concerns with performance, we should determine either perfective maintenance can increase the system performance or not . Adaptive and corrective maintenance more important than perfective maintenance. Sometimes, perfective maintenance can be considered as a part of new project.

9. P r e v e n t i v e M a i n t e n a n c e Changes are made in order to avoid future problems and reduce the system failure. To avoid any problems, it requires analysis of areas where the problems might be occurred. Normally, preventive maintenance is initiated by the team. It often results in increased user satisfaction and decreased downtime. Preventive maintenance is important in order to avoid future problems

10. C O N D U C T I N G A N D M A N A G I N G M A I N T E N A N C E Cost of Maintenance Configuration Management Maintenance Team Managing Maintenance Request

11. T H A N K S