What are the contents of management information system maintenance?

1, corrective maintenance. As we all know, system testing can't find all the errors in the system, and there are many potential errors, which will only appear when the system runs under certain incentive conditions. People call the maintenance of diagnosing and correcting such errors corrective maintenance.

2. Adaptive maintenance. Adaptive maintenance refers to the system maintenance when the external environment of the information system changes. The development of computer technology (including hardware and software) is very fast, and the service life of general systems exceeds the service life of the system environment when the system was just developed. The constant updating of computer hardware system and the appearance of new operating system or new version of operating system all require corresponding changes to the system. In addition, changes in the data environment (such as version upgrade of database management system, changes in data storage media, etc.). ) also needs the adaptive maintenance of the system. Adaptive maintenance should also make a maintenance plan and organize its implementation step by step.

3. Perfect maintenance. After the information system is put into use and successfully operated, users may request to modify some functions and add new functions due to the changes and expansion of business requirements of enterprises. This system maintenance is called perfect maintenance. Its purpose is to improve and strengthen the function of the information system and meet the increasing demand of users for the system.

4. Preventive maintenance. Preventive maintenance is a proactive preventive measure, which is used to maintain some modules that have been used for a long time and are still running normally at present, but may change to adapt to future modification or adjustment. Compared with the first three types of maintenance, preventive maintenance work is relatively less.