What is the difference between process-oriented (or structured) analysis methods and object-oriented analysis methods?

Simply put, the structural analysis method is mainly used to analyze the functions of the system, according to the internal logic of the system to decompose the complex system into easy to understand and analyze the subsystem, is a direct data flow based on the function of the analysis method of the hierarchy, The object-oriented analysis method is to set up the demand model by abstracting classes and objects from the obtained demand information and analyzing the static relation between them, then combining the practical problems, determining the dynamic behavior of objects and the information transfer between objects.

The structural analysis method is more traditional, mainly applies to the data processing, it mainly to the non-professional people also easy to understand the graphical symbols to represent the basic function of the system; If a large complex system is encountered, it is divided into a simple and understandable subsystem according to the logical relationship within the system. Then, according to the actual situation to determine the internal data flow and exchange relationship, and with the diagram to express, in order to better understand the whole system.

Description means:

1, a set of hierarchical flow chart: representing the various parts of the system, as well as the relationship between the parts;

2, Data dictionary: For each of the elements appearing in the flow chart description;

3. Other Supplementary materials

The object-oriented analysis method is mainly divided into two aspects: Problem analysis and application analysis. The problem analysis is mainly through the analysis of the requirement information, from which the entity in the information is identified as the object class in the problem domain, and the relationship between the object classes is defined. Application analysis is the dynamic information that describes the message passing between objects and working together. This shows that the object-oriented analysis process is essentially the process of creating a model. In solving a problem, it is first to abstract the relationship between the entities and entities involved in the actual problem into a static object model, and if the problem involves the interaction between the user and the system, the dynamic model needs to be constructed.

Description means:

1, build the object model: According to the actual problem to determine the object and class, and their static relationship;

2, Build dynamic model: In the actual problem inevitably exist time series relationship and state change, by constructing dynamic model to express this change;

3, build the function model: to represent the transfer and processing of data flow inside the system.

4. Define operations in classes and objects: Determine the services to be provided in the class based on the functional model and the dynamic model;

To sum up: I think the structural analysis focuses on the decomposition of the problem, "piecemeal, conquer", whereas object-oriented analysis focuses on creating the model and abstracting the actual problem to solve the problem.

What is the difference between process-oriented (or structured) analysis methods and object-oriented analysis methods?