Time Sequence Diagram

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Time Sequence Diagram

• Dr. Zhen Jiang
• West Chester University
• E-mail zjiang_at_wcupa.edu
• url www.cs.wcupa.edu/zjiang

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Time Sequence Diagram

• A sequence diagram is an interaction diagram that
  focuses on the time ordering of messages
• A vertical dashed line is used to represent the
  lifetime of an object (its the objects
  lifeline)
• A focus of control is a tall, thin rectangle that
  shows the period of time during which an object
  is performing an action

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Its a repetition of associate member function
Any object of class Pilot
ATC
Radar
Pilot
requestLdgClearance(r)
checkWeather
Asynchronous action
checkRunwayClear(r)
clear
clearance
Synchronous action
Focus of action
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An Example of Time Sequence Diagram
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Another Example
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Another Example