Information systems development process is divided into several phases?

Divided into five phases: planning phase, analysis phase, design phase, implementation phase, maintenance and evaluation:

1, planning phase

The task of the system planning phase is: in the original system for the initial investigation on the basis of the requirements for the development of a new system, according to the needs and possibilities of the new system to give the overall program, and the feasibility of these programs to conduct a feasibility analysis to produce system development plan and feasibility study report two documents.

2, analysis stage

The task of the system analysis stage is to conduct a detailed survey of the current system according to the scope of the system development plan, describe the business processes of the current system, point out the limitations and shortcomings of the current system, determine the basic objectives of the new system and the logical model, this stage is also known as the logical design stage.

3, the design stage

System analysis phase to answer the question of the new system, "what to do", and the task of the system design phase is to answer the question of "how to do", that is, according to the functional requirements set out in the system analysis specifications

4, the implementation phase

The tasks of the system implementation phase include the acquisition, installation and debugging of computers and other hardware equipment, the preparation and debugging of applications, personnel training, data file conversion, system debugging and conversion.

5, maintenance and evaluation

After the system is put into operation, it is necessary to frequently carry out maintenance, record the operation of the system, make the necessary modifications to the system according to certain procedures, and evaluate the system's work quality and economic efficiency.

Expanded Information

Basic Functions

1. Data Processing Functions

2. Planning Functions

Provides plans for each functional department according to existing conditions and constraints. Such as production plan, financial plan, procurement plan and so on. And according to the different management levels to provide the appropriate planning reports.

3, control functions

According to the data provided by the functional departments, the implementation of the plan to monitor, check, compare the implementation of the differences between the plan, analyze the differences and the reasons for the differences, assisting managers to control in a timely manner.

4, forecast function

Use of modern mathematical methods, statistical methods or simulation methods, based on existing data to predict the future.

5, auxiliary decision-making function

Using the corresponding mathematical model, from a large amount of data to derive the optimal solution and satisfactory solution to the problem, assisting managers in decision-making. In order to rationally utilize resources and obtain greater economic benefits.

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