Briefly explain the characteristics, functions and application scope of the structural model.

Briefly explain the characteristics, functions and scope of application of the structural model as follows:

Interpretative structural modeling method is a widely used analysis method and structural modeling technology in modern system engineering. It decomposes a complex system into several subsystem elements, and finally forms a multi-level hierarchical structure model with the help of people's practical experience and knowledge and computers.

qualitative analysis

This model is mainly qualitative analysis, belonging to conceptual model, which can transform vague ideas and viewpoints into intuitive models with good structural relations.

Wide application range

It is especially suitable for system analysis with many variables, complex relationships and unclear structure, and can also be used for scheme sequencing. It has a wide range of applications, from international issues such as energy issues to regional economic development, enterprises and even personal issues.

Extended knowledge

In ISM, the establishment of the final hierarchical structure model has gone through several steps, such as diagram, relation matrix, accessibility matrix, hierarchical division and so on. If we don't consider the number of layers, we can draw the relative position relationship of each element in the graph and obtain a clear hierarchical graphic structure as long as we know the up-down relationship of nodes in the directed graph.

Its actual process is a process of finding strongly connected subsets. All three classical SCC algorithms can get a hierarchy diagram, but the number of hierarchies obtained in this process is more than that obtained by traditional methods.

The software of brain map (concept map) was once very popular in the market, and concept map was once very popular for a while. This software is also a modeling process, much like ISM. The important difference is that brain maps are mainly organized in the form of trees. Generally, the converted hierarchical structure and layers are more than those in the structure diagram obtained by ISM!

In the whole process of software compilation, it should be pointed out that the biggest workload is not to rack one's brains for fast Warshall iteration, but to solve these core steps of reachability matrix; The biggest workload is the performance of the map on the web page. Here, I would like to bow to the author of jsplumb, which provides a rich tool JS for drawing vector arrows, and can easily realize the drag function.

In this way, the author does not have to consider other expressions. Another advantage of jsplumb is that it supports almost all browsers. Of course, in some old browsers, such as IE6, the function of dragging elements on web pages is rarely supported. I calculated that if a page outputs more than 30 arrows, it will be very slow.