Cam and groove coupling in software engineering

　　Simply speak, the cam and groove coupling degree between objects in software engineering is the object dependencies. The main problems of guidance on the use and maintenance object is multi dependency between objects. Cam and groove coupling between objects is high, the maintenance cost is high. Hence the object should be designed so that the between class and member coupled minimal. The coupling between software and hardware, and the coupling between modules of software.

　　Cam and groove coupling is a measure of correlation between each module program structure. Complexity, the calling module and it depends on the interface between each module and the way what information through the interface.

　　Cam and groove coupling is an important factor that affects the complexity of software and design quality in design, we should adopt the following principles: if there is cam and groove coupling existing in modules, use as far as possible data coupling, less using control cam and groove coupling, limit the scope of public coupling, try to avoid the use of content coupling.

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