- #Coupling and cohesion in software engineering ppt how to#
- #Coupling and cohesion in software engineering ppt code#
- #Coupling and cohesion in software engineering ppt series#
As a consequence there was no concept which set of development classes form an application.
Why are package hierarchies useful? When you have a look at legacy development classes there was no concept of package hierarchies.
#Coupling and cohesion in software engineering ppt series#
In the last instalment of this series I discussed package interface which reflects the concept of coupling: what are the dependencies between software packages within in application and between applications? We will discuss another way the package concept supports this concept and the related concept of cohesion which means how “focused” a software module like a package is. Please be aware that I describe package concept in Releases 6.10 up to 7.02 and things will change slightly in 7.30 but this is topic for another blog.
#Coupling and cohesion in software engineering ppt how to#
Now I introduce packages hierarchies and discuss how they can be used to structure applications: what packages build an application and how to define functional cohesion in an application. An example can be of the parameters that are passed to a function block.In the first part of this weblog series I introduced the ABAP package concept ( ABAP Package Concept Part 1 – The Basics ) and package interfaces ( ABAP Package Concept Part 2 – Package Interfaces of Development Packages). Two modules are said to be data coupled if they communicate through some parameters. Stamp Coupling: Two modules are said to be stamp coupled if they both use a composite data item to interact with each other.ĭata Coupling: This type of coupling is the weakest one. A well-known example of this can be the set of flags of a module by some other module. Here, mostly, one or two bits of signal data are passed which controls the operations happening in some other module. These data items must be in global access to both of the modules so that both the modules can be able to access these data items.Ĭontrol Coupling: If the data from the module is responsible for controlling the activities happening in another module, then these modules are said to be control coupled. This type of coupling is termed to be the strongest type of coupling.Ĭommon Coupling: Two modules are said to be commonly coupled if they share the data using the same data items (i.e.
#Coupling and cohesion in software engineering ppt code#
the code of both the modules, has some parts in common which are the functions and methods that are used by both of the modules. What this means is that the content, i.e. Now, let us define each of them to understand what they mean:Ĭontent Coupling: In the content coupling, the two modules are connected as they share the same content. The sequence of the given classification is from high to low in a top-to-down manner. The different classes of coupling are as follows: Now, the term coupling is further classified into different classes which help us to quantitatively determine the level of coupling between two modules.
Else, we say that the two modules are loosely coupled or the coupling between the modules is low. If any of the modules (or both) is highly dependent on the data that the other module provides to it, then we say that the two modules are highly coupled. Now, the level of coupling that exists among the two modules is defined by the number of data transfers that take place among them. The interconnection of interdependency between two modules is defined by the interface between them because any two modules cannot be connected if there exists no interface between them. How can the coupling between two modules be defined? It should be noted that a module that has high cohesion and low coupling is functionally independent. Hence, the term coupling is defined as follows: "“The measure of the degree of the interdependency of two modules on each other is known as coupling." how tight interaction do the two modules hold with each other is defined by coupling. If we talk about software development, then the term coupling is related to the connection between two modules, i.e. In general terms, the term coupling is defined as a thing that joins together two objects. Submitted by Monika Sharma, on October 13, 2019
In this article, we are going to learn what this term means and how is it connected to software development? This article is an introduction to a very popular term related to software development: Coupling.
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