Differences between Coupling and Cohesion – Software Engineering

What is Cohesion

Cohesion is the indication of the relationship within the module. It is the concept of intro-module. Cohesion has many types but usually, high cohesion is good for software. 

What is Coupling

Coupling is also the indication of the relationships between modules. It is the concept of the Inter-module. The coupling has also many types but typically, the low coupling is good for software. 

Differences between Coupling and Cohesion

The differences between cohesion and coupling are given below:

Aspect	Cohesion	Coupling
Definition	Cohesion is the concept of intro-module.	Coupling is the concept of inter-module.
Purpose	Cohesion represents the relationship within a module.	Coupling represents the relationships between modules.
Quality	Increasing cohesion is good for software.	Increasing coupling is avoided for software.
Focus	Cohesion represents the functional strength of modules.	Coupling represents the independence among modules.
Relationship	Highly cohesive gives the best software.	Whereas loosely coupling gives the best software.
Example	In cohesion, the module focuses on a single thing.	In coupling, modules are connected to the other modules.
Creation	Cohesion is created between the same module.	Coupling is created between two different modules.
Types	There are Six types of Cohesion Functional Cohesion. Procedural Cohesion.  Temporal Cohesion. Sequential Cohesion. Layer Cohesion. Communication Cohesion.	There are Six types of Cohesion Functional Cohesion. Procedural Cohesion. Temporal Cohesion. Sequential Cohesion. Layer Cohesion. Communication Cohesion.

Frequently Asked Questions (FAQs) on Coupling vs Cohesion

1. What is the difference between coupling and cohesion?

The main Difference between Coupling and Cohesion is Cohesion is the concept of intro-module while Coupling is the concept of inter-module.

2. What is low coupling and high cohesion?

Low coupling means the different parts of the software don’t rely too much on each other, which makes it safer to make changes without causing unexpected problems. High cohesion means each part of the software has a clear purpose and sticks to it, making the code easier to work with and reuse.

3. What is the difference between high and low coupling?

High coupling means that different parts of a program rely heavily on each other. If one part changes, it’s likely to affect many other parts while Low coupling, on the other hand, means that different parts of a program are more independent of each other. Changes in one part are less likely to affect other parts.