Ques. On page 478 the textbook identifies and discusses four types of maintenance tasks. Post an entry to your blog that gives one example of each type of maintenance task that might be needed once the Capricornia Car Pool System (the system you are designing in assignments 1 and 2) is in operation?
Ans.
The typical patterns for each of the four classifications of maintenance activities over a system’s life span are:
Corrective maintenance- It diagnoses and corrects errors in an operational system. In addition to the correction of the errors in the original operating system, corrective maintenance is needed t resolve issues created by previous changes of maintenance. The best approach of maintenance is to investigate, analysis, design and testing before implementing any solution. One can respond to the errors in various ways, depending on the nature and severity of the problem.
Adaptive maintenance- It adds new feature, capabilities or enhancements to an operational system and makes the system easy to use. The requirement for the adaptive maintenance arises from changes in business environment like new services or products, support for a new web-based operation but this system requires more IT department resources than minor corrective maintenance. Adaptive maintenance can be more complicated than the new system development because the enhancements have to work within the constraints of an existing system.
Perfective maintenance- It involves in changing the operational system to make it more efficient, reliable, or maintainable. Requests for the corrective and adaptive maintenance usually come from the users, while the IT department initiates perfective maintenance. During the system operational changes such as changes in the user activity or data patterns can cause inefficiency and then perfective maintenance might be needed to restore performance. In many of the organizations perfective maintenance is not performed frequently as they have limited resources so they prefer adaptive or corrective maintenance.
Preventive maintenance- It requires analysis of areas where problems or troubles are likely to occur so that they can avoid problems before they occur. Like perfective maintenance, the IT department initiates preventive maintenance. This maintenance results in the user satisfaction, decreased downtime and reduced TCO.
