Hands-On Design Patterns with Java

Timing diagrams

Timing UML diagrams provide a visual representation of a system's time constraints.

The following example shows two time constraints in a bank's vault security system. There are two objects:

• Bio Security System
• Vault

Each starts in the Off state. The first time constraint indicates that the vault must be opened within 15 seconds of the Bio Security System being activated. The second time constraint is that the vault can only be open for 20 minutes or less:

Sample timing diagram