Object-Oriented Software Engineering¶

Cohesion¶

the single-mindedness of a module

Cohesion implies that a component or class encapsulates only attributes and operations that are closely related to one another and to the class and component itself.

Levels of cohesion¶

Functional
Layer
Communicational
Sequential
Procedural
Utility

Coupling¶

The degree to which a component is connected to other components and to the external world

A qualitative measure of the degree to which classes are connected to each other

Levels of coupling¶

Content
Common
Control
Stamp
Data
Routine call
Type use
Inclusion or import
External