![]() Sequence diagrams can be used to illustrate the behavior of the design patterns and techniques the system employs when building its architecture. Sequence diagrams show how the system functions to carry out interactions during the design process. Sequence diagrams can be improved to demonstrate how a system completes interactions. Sequence diagrams can be useful in the analysis phase for determining the classes a system requires and the functions that class objects perform in interactions. Sequence diagrams can be used to show how class instances interact in order to fulfill a use case during the analysis phase. Sequence diagrams can be used to explain interactions between system objects at various phases of development, as seen in the accompanying table. Development process and sequence diagrams ![]() The objects and the communications exchanged between them are depicted in the sequence diagram. Messages transmitted between them serve as a representation of the interaction between the customer, teller, and manager. A customer, teller, or bank manager, for instance, could be represented by a lifeline in a sequence diagram for a banking scenario. Sequence diagrams can also display the command chains that link items. The order in which messages are transferred between objects is depicted in a sequence diagram. A group of objects that are represented by lifelines and the messages they exchange over the course of an interaction makes up a sequence diagram. A sequence diagram is a diagram created using the Unified Modeling Language (UML) that shows the flow of messages sent and received by objects during an interaction.
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