Checkpoints: Signal

• The signal name is unique.
• The signal is used in at least one collaboration.
• The signal’s brief description captures the purpose of the signal and briefly summarizes the role it plays in the system.
• The signal reflects a single well-defined purpose.
• The signal name describes the purpose of the message rather than how to achieve the purpose.
• The signal name does not reflect “destination dependency” which would reduce reuse potential (e.g. ‘RequestInformationOfLeftTerminal’).