What are the five phases of system analysis and the names of the main tools used in that phase

The question is not quite precise.

In the case of a Vista system, the system itself comes with this feature. If you are using other systems (e.g. XP), you can use Windows Optimizer.

The main tools of system analysis: there are requirements analysis toolsSoftware designtools, database design tools, project management tools, programming tools, testing tools.

The main task of system analysis is to analyze the overall management status and information processing process within the organization by bringing together the documents obtained from the detailed investigation of the system. It focuses on analysis from the perspective of the whole business process. The main content of the analysis is whether the business and data flow is smooth and reasonable; the relationship between data, business processes, and the implementation of management and stupidity functions; Whether the reform of the old system management model and the implementation of the new system management method are feasible.

The purpose of the system analysis is to identify the needs of users and their solutions, and the results of these needs include the developer's knowledge of the current state of organization management; user demand for information system functionality; Data and business processes.

management of power files and management data indicator system; The new system is proposed to be changed and the new management model is added, etc. The content determined by the system analysis is the basis for future system design and system implementation.

In the system analysis phase, the tools used for data analysis are ( )aStructured languages.

b.Decision tree.

c.Business process diagrams.

d.The number of changes to the sail burns according to the dictionary.

Check the answer analysis [Concise answer to the car] d

Answer Analysis] This question examines the data dictionary, a tool used in the data analysis stage. The tool for the data analysis phase is the data dictionary. Decision trees, decision tables, and structured languages are all used for functional analysis; Business process diagrams are used for system requirements analysis. Therefore, the answer to this question is D.

Knowledge points of this question:

The systematic methods of job analysis mainly include: job analysis questionnaire method, management job description questionnaire method, and functional job analysis method.

1. Determine the scope of the research object and define the system and environment.

2. Set system objectives, analyze system objectives, and establish an indicator system.

3. Investigation and research and data collection are the basis for carrying out system analysis, and provide a basis for formulating system plans and establishing system models.

4. Determining the criterion is the criterion for systematic review and its optimal selection.

5. Apply the principle of system decomposition and coordination, adopt the technique of "dividing the whole into zero, and integrating the zero into the whole", and carry out the analysis process of system decomposition-synthesis-decomposition for many times, and conduct a qualitative and quantitative all-round analysis of the system structure, function and utility and system environment through the establishment of a system model.

6. Formulation and selection of system schemes. The best option is selected or determined through the development of two or more feasible options, using systematic evaluation and optimization techniques.

7. Simulated inspection. The selected implementation plan is simulated before implementation to ensure the reliability and effectiveness of the program implementation.

A systematic description of the object of study and the problem to be solved, with the aim of determining the objectives and explaining the focus and scope of the problem;

Collect data, analyze the interrelationship between various factors through data analysis on the basis of systematic analysis, and seek feasible solutions to solve problems;

According to the nature and requirements of the system, establish various mathematical models;

Use mathematical models to compare and weigh the pros and cons of various schemes;

Determine the best solution. Through analysis, if you are not satisfied with the selected solution, you can re-analyze it according to the original steps. A successful system analysis requires multiple iterations and comparisons of options to find the optimal solution.

The main contents of the system analysis include:

Collection of data.

Analysis of data.

Determination of the system data flow diagram.

Determination of system scheme, etc.

The system analysis phase is a critical stage in the construction of the whole MIS.

Systems analysis is one of the main and critical stages of management information systems, the key person responsible for this stage is the system analyst, and the key issue to complete the tasks of this stage is the communication between the developer and the user.

The system analysis starts from the system requirements and establishes the system user model from the user's point of view. The user model is a comprehensive conceptual expression of system requirements and the relationship between the system and the user. On the basis of the user model, the system analysis establishes a logical structure that is adaptable and independent of the system implementation environment.

The analysis stage is independent of the system implementation environment, which can ensure that the established system structure has relative stability, which is convenient for system maintenance, transplantation or expansion.

In the system analysis stage, the logical structure of the system should fully reflect the function and performance of the system from the following three aspects:

1) Information. a complete description of all information processed in the system;

2) Behavior. A complete description of the processing or function required for a change in the state of the system;

3) Representation. Describe in detail the external interface and interface of the system.