In our sequence diagram passenger check-in, the passenger starts the interaction by utilizing the service check-in from passenger services. Since in the external view of the business model each business use case is initiated by an actor, we can here also select the actor from the pool of actors in the use case diagrams. In our case study (see Figure 3.24), we find the interaction partners passenger and passenger services for the above sequence diagram (Figure 3.23): Figure 3.24 Constructing sequence diagrams Designate Initiators-Who Starts Interactions?įor every sequence of interactions the actor who starts the interaction has to be identified. ![]() Depending on the flow that is being depicted in the sequence diagram, the appropriate actors and business systems can be selected from this pool. Fundamentally we have a pool of interaction partners from the use case diagrams. Sequence diagrams illustrate the interactions between actors and the business system. Insert additional information-What else is important?ĭesignate Actors and Business System-Who is Taking Part?.Identify the course of interactions-What is the order?.Describe the message exchange between actors and business system-Which messages are being exchanged?.Designate initiators-Who starts interactions?.Designate actors and business system-Who is taking part?. ![]() Checklist 3.5 Constructing Sequence Diagrams in the External View Subsequently, we will further explain the individual steps. The following checklist shows the necessary steps for the construction of sequence diagrams.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |