Software maintenance

Software maintenance

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  SOFTWARE MAINTENANCE PRESENTEDBY :- Prafull Johri
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  CONTENT  WHATIS SOFTWARE MAINTENANCE ?  SOFTWARE MAINTENANCE INCLUDES  NEED OF MAINTENANCE  TYPES OF MAINTENANCE Corrective Perfective Adaptive Preventative  MAJOR CAUSE OF MAINTENANCE PROBELEM  DISTRIBUTION OF MAINTENANCE ACTIVITY
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  WHAT IS SOFTWAREMAINTENANCE ? Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes.
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  SOFTWARE MAINTENANCE INCLUDES:-  Error correction  Enhancements of capabilities  Deletion of obsolete capabilities  Optimization
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  NEED OF MAINTENANCE  software needs to be modified from time to time to keep it up to date with environment changes and changing user requirements. Maintenance is the last stage of the software life cycle. The software should keep pace with organizational developments. In this sense, maintenance is an ongoing process.  . For instance, when the operating system is changed, the software may also need certain modifications. Usually, every software product continues to evolve after its development through maintenance efforts.
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  TYPES OF MAINTENANCE  Corrective  Perfective  Adaptive  Preventative
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  CORRECTIVE MAINTENANCE Corrective software maintenance involves developing and deploying solutions to problems ("bugs") that arise during use of a software program.  Computer users will notice performance problems with software, such as error messages coming on the screen or the program freezing or crashing, meaning corrective software maintenance is needed.
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  PERFECTIVE MAINTENANCE Perfective software maintenance involves computer programmers working to improve the way a software program functions.  Sometimes programmers need to conduct perfective maintenance on software because of outside influences, such as new government regulations that affect how a business operates.
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  ADAPTIVE MAINTENANCE The field of technology constantly changes through both hardware and software developments. Adaptive software maintenance addresses these changes.  FOR EXAMPLE A change in a processor's speed, will affect how the software performs on a single computer.
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  PREVENTATIVE MAINTENANCE When computer programmers engage in preventative software maintenance they try to prevent problems with software programs before they occur.  Programmers seek to prevent corrective maintenance as much as possible, while also anticipating adaptive maintenance needs before users experience problem.
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  MAJOR CAUSE OFMAINTENANCE PROBELEM  Unstructured code  Insufficient domain knowledge  Insufficient documentation
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  DISTRIBUTION OF MAINTENANCEACTIVITY corrective 21% adaptive 25% preventive 4% perfective 50%