1, planning stage
The task of the system planning stage is to put forward the requirements for developing the new system based on the preliminary investigation of the original system, give the overall scheme of the new system according to the needs and possibilities, and analyze the feasibility of these schemes to produce two documents: the system development plan and the feasibility study report.
2. Analysis stage
The task of the system analysis stage is to investigate the existing system in detail according to the scope determined in the system development plan, describe the business process of the existing system, point out the limitations and shortcomings of the existing system, and determine the basic objectives and logical model of the new system. This stage is also called the logic design stage.
3. Design stage
The system analysis stage answers the question of "what to do" of the new system, while the task of the system design stage is to answer the question of "how to do it", that is, according to the functional requirements stipulated in the system analysis specification and considering the actual situation, the technical scheme of realizing the logical model is specifically designed, that is, the physical model of the new system is designed.
4. Implementation phase
The tasks in the implementation stage of the system include the purchase, installation and debugging of hardware equipment such as computers, compilation and debugging of application programs, personnel training, data file conversion, system debugging and conversion, etc.
5. Maintenance and evaluation
After the system is put into operation, it needs regular maintenance, records the operation of the system, makes necessary modifications to the system according to certain procedures, and evaluates the work quality and economic benefits of the system.
Basic functions of extended data
1, data processing function
2. Planning function
According to the existing conditions and restrictions, provide the plans of various functional departments. Such as production plan, financial plan, procurement plan, etc. And provide corresponding planning reports according to different management levels.
3. Control function
According to the data provided by various functional departments, supervise and inspect the implementation of the plan, compare the differences between the implementation and the plan, analyze the differences and the reasons for the differences, and assist the management personnel to control them in time.
4. Prediction function
Use modern mathematical methods, statistical methods or simulation methods to predict the future according to the existing data.
5, auxiliary decision-making function
Using the corresponding mathematical model, the optimal solution and satisfactory solution of related problems are deduced from a large number of data to assist managers in decision-making. In order to make rational use of resources and obtain greater economic benefits.
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