Difference between coupling and cohesion in software engineering ppt

Difference between coupling and cohesion in software engineering ppt update#

For example, a module containing all the functions required to manage employeesвЂ™ pay-roll exhibits functional cohesion.

Functional Cohesion: Functional cohesion is said to exist if different elements of a module cooperate to achieve a single function.

For example, in a TPS, the get-input, validate-input, sort-input functions are grouped into one module. Dutoit Object-Oriented Software Engineering: Using UML, Patterns, and Java 16.

Sequential Cohesion: A module is said to possess sequential cohesion if the elements of a module form the parts of the sequence, where the output from one element of the sequence is input to the next.

the set of functions defined on an array or a stack.

Difference between coupling and cohesion in software engineering ppt update#

Communicational Cohesion: A module is said to have communicational cohesion, if all functions of the module refer to or update the same data structure, e.g.

Procedural Cohesion: A module is said to possess procedural cohesion, if the set of functions of the module are all part of a procedure (algorithm) in which certain sequence of steps have to be carried out for achieving an objective, e.g.

The Structure Chart Qualities of Good Design Coupling Cohesion Factoring Fan-out Fan-in Transform Analysis The Structure Chart - 1. The set of functions responsible for initialization, start-up, a shutdown of some process, etc. CSE3308 - Software Engineering: Analysis and Design, 2005 Lecture 5A.6 Software Engineering: Analysis and Design.

Temporal Cohesion: When a module contains functions that are related by the fact that all the functions must be executed in the same time span, the module is said to exhibit temporal cohesion.

An example of logical cohesion is the case where a set of print functions generating different output reports are arranged into a single module. error handling, data input, data output, etc. Logical Cohesion: A module is said to be logically cohesive, if all elements of the module perform similar operations, e.g.The grouping does not have any relevance to the structure of the problem. For example, in a transaction processing system (TPS), the get-input, print-error, and summarize members functions are grouped into one module. In this post, we will understand the difference between cohesion and coupling CohesionIt is an intra module concept.It represents relationships within the mo. It is likely that the functions have been put in the module out of pure coincidence without any design or thought. The spell check feature in word processor is a module of software, which runs along side the word processor itself. In this case, the module contains a random collection of functions. Coincidental Cohesion: A module is said to have coincidental cohesion if it performs a set of function or tasks that relate to each other very loosely.The different classes of cohesion that a module may possess are shown in Fig.