1. Perfect organization
Organization and management of information system is a comprehensive department of information system development, maintenance and management. In many large enterprises, there are information centers (or computing centers) responsible for enterprise informatization construction. Information system maintenance department generally consists of software and hardware maintenance department, data information maintenance department and administrative department. Because the organization responsible for the operation of information system in enterprises is not high, it is often ignored, which leads to the imperfect organization of information system in China and affects the development and application of information system. With the acceleration of enterprise informatization construction and the continuous improvement of enterprise informatization consciousness in China, the status of information system organization in enterprises is also constantly improving.
2. Establishment of management system
A perfect management system is one of the necessary conditions to ensure the normal operation of the system. Only by establishing a perfect management system can the enterprise information system have rules to follow in its daily operation and lay a foundation for the production, operation and management of enterprises.
The following lists some management systems in the daily operation of the information system, which stipulate the daily operation of the system and the handling of emergencies from the aspects of system security and operation.
(1) system operating procedures.
② Security and confidentiality system of system information.
(3) the system running log and fill in the rules.
(4) Regular system maintenance.
⑤ System safety management system.
⑥ User operating procedures.
⑦ System modification program.
3. Maintenance personnel
As a system maintainer, we should not only understand the development process of the system, but also be good at establishing a good relationship between maintainers and operators. System maintenance personnel should be able to predict those possible mistakes, and also consider the changes of necessary functions according to the changes of business requirements, and consider modifying hardware, software and their interfaces according to the changes of system requirements. Therefore, the maintenance work involves a wide range and is a long-term and complicated work.
Who should be the system maintainer? Independent or jointly developed information systems can be maintained by program developers or users who participate in system development. They understand the system architecture and program system content, and can easily complete the system maintenance task. Enterprises should train system maintenance personnel or entrust software companies to be responsible for the system maintenance of commercial software.
4. Arrangement of maintenance tasks
Information system will encounter various types of maintenance tasks during its operation, so it must be managed uniformly and effectively to ensure the orderly maintenance of the system. In other words, some maintenance tasks are urgent, and some maintenance tasks can be postponed for a while. We need to sort them in a certain way to decide which maintenance task to perform first and which to perform or ignore, as shown in the figure.
Generally speaking, the type of maintenance task should be determined first. For example, for corrective maintenance, it is necessary to judge the importance of the fault that caused the error. If it is very important, it needs to be given higher priority and placed in front of the task queue for maintenance. For another example, some maintenance tasks are not caused by mistakes, but to adapt the system to new technologies or to add new business functions for business changes. Similarly, these tasks need to be evaluated, classified and sorted, and then placed in the task queue. It should be noted that there must be a * * * same standard to evaluate and judge each system maintenance task as the basis for its classification and sequencing.
5. The use of automated maintenance tools
In the process of information system development, the most time-consuming work is system coding and testing. Moreover, in system maintenance, if the system modification is approved, code modification and testing are still needed. At the same time, the modified information must be updated in the system documents and descriptions to ensure the consistency of all system documents. However, these tasks are often boring and time-consuming, so many maintenance tasks in the system are often ignored by maintenance personnel, which will inevitably bring difficulties to future maintenance work.
In order to solve the above problems and improve the maintenance efficiency, many companies have developed CASE automation tools to support system maintenance, which can realize the synchronization of code modification and document update and provide support for system maintenance. Especially when using some comprehensive case development environments, the system can automatically generate all documents for system analysis, design and maintenance, such as data flow diagram, code design, output design and so on. Moreover, if the system design document is modified, the system will automatically modify the code and generate a new version. At the same time, the maintenance of most documents will be completed automatically. Therefore, the use of automation tools can