Coupling and Cohesion in Software Engineering

Study Notes

Software Development Life Cycle (SDLC) - Design Phase

The Design Phase in the SDLC is crucial for defining the software's architecture, modules, interfaces, and data structures. It translates user requirements into a technical blueprint for the development team.

Coupling in Software Modules

High coupling refers to a strong dependency between software modules. This means that one module relies heavily on the internals of others.

Cohesion Within Modules

Low cohesion within a module means that its functionalities are loosely related or disparate. This implies a lack of focus and a potential for scattered logic within the module.

Impact of Coupling and Cohesion

High coupling and low cohesion often lead to complex, brittle, and difficult-to-maintain software systems. Changes in one module can ripple through the entire system, making it prone to errors.
High coupling makes it difficult to reuse individual modules in other projects.
Low cohesion increases complexity during development and testing, as internal module logic becomes intertwined.

Iterative Design Process: First Part

The first part of the iterative design process typically involves defining the system's overall architecture, outlining major components, and creating high-level design models.

Description

Learn about the key concepts of coupling and cohesion in software engineering, and how they are used to measure the quality of a software system's design. Understand the significance of these concepts in the design phase of the Software Development Life Cycle.