1, correctness maintenance
It refers to correcting errors that have occurred in the system development stage but have not been found in the system testing stage. According to statistics, the maintenance workload in this area accounts for 17% ~ 2 1% of the total maintenance workload.
2. Adaptive maintenance
It refers to the modification of application software to adapt to the changes in information technology and management requirements. This maintenance workload accounts for 18% ~ 25% of the whole maintenance workload.
3. Perfect maintenance
This is a modification to expand functions and improve performance. It mainly refers to adding some functions and performance characteristics to the existing software system that are not specified in the system analysis and design stage. These functions are very necessary to improve the system functions. It also includes the improvement of processing efficiency and programming.
This aspect of maintenance accounts for 50% ~ 66% of the whole maintenance work, accounting for a large proportion, and it is also an important aspect related to the quality of system development. In addition to planned and step-by-step maintenance, we should also pay attention to adding relevant documents to the corresponding documents in front.
4. Preventive maintenance
In order to improve the reliability and maintainability of application software, adapt to the changes of future software and hardware environment, and actively add new preventive functions, so that the application system can adapt to various changes without being eliminated. This maintenance workload accounts for about 4% of the total maintenance workload.
The construction elements of tourism management system;
1, system management target
No matter what kind of tourism management system, we should first make clear the overall goal of the system management, then decompose the overall goal of the system into sub-goals of each subsystem through goal orientation, and then use scientific management methods to urge each subsystem to strive to achieve the set goals, so as to complete the overall management goal of the tourism management system.
2. System management resources
Once the system management goal is determined, it is necessary to organize various management resources such as people, finance and materials according to the requirements of achieving the goal and the actual needs of each subsystem, so that the distribution of various resources in each subsystem can reach a reasonable proportion and the input-output ratio of resources can be maximized. Only under the guarantee of reasonable management resources organization can the tourism management system achieve the management objectives and tasks efficiently.
3. System management control
Tourism management system belongs to artificial system, and only with the system control link can we ensure the coordinated development of each subsystem towards the goal realization.
The so-called system management control is based on the information feedback of the tourism management system. According to the different functions and management objectives of each subsystem, different control methods are adopted to monitor the operation process of each subsystem of tourism management to ensure the normal operation of the tourism management system.