Introduction to Software Engineering
Introduction to Software Engineering
Introduction to Software Engineering
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Notations<br />
1. Columns = objects<br />
1. Leftmost column = initia<strong>to</strong>r<br />
2. Horizontal arrows = messages/stimuli<br />
1. Write name of method/operation on arrow<br />
2. Have origin and destination<br />
3. Time progresses vertically (<strong>to</strong>p <strong>to</strong> bot<strong>to</strong>m)<br />
4. Activation period = vertical rectangle<br />
1. Dotted line – alive but inactive<br />
5. = objects that are created in the sequence<br />
6. X = objects that are destroyed<br />
7. Be precise!<br />
Winter 2009, Maheswaran <strong>Introduction</strong> <strong>to</strong> <strong>Software</strong> <strong>Engineering</strong> – ECSE321 Unit 6 – Analysis /59
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