Consider the first point of the scenario (or if you get it from the first point of the flow of event of a use case).You should know the primary actor(s) who activates the use case.If you derive the sequence diagram based on a scenario of a use case, select the normal scenarios first.Identify a set of objects that will participate in the general collaboration (or use case scenario).Either model generic interactions (showing all possible paths through the interaction) or specific instances of a interaction (showing just one path through the interaction).Model the interaction between objects within a collaboration that realizes an operation. ![]()
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