2. Dependence Relationships

2. Dependence Relationships
	Chapter 14. Decoupling

The most basic notion relationship between parts is the uses relationship.

A uses B when the behaviour of A depends on the behaviour of B

Figure 14.1. Uses Diagram of a Web browser.

Trees: In general the uses diagram are not trees, but part of them can form trees.
Layers
Figure 14.2. Layered diagram for the Protocol module.
Cycles
Figure 14.3. Display showing a cycle relationship with Main.

What can be done with uses diagrams:
- Reasoning.
- Reuse.
- Construction Order.


1. Why Decompose		3. Dependences & Specifications