In the Automated Trading House System, let us model Order as an object and trace its sequence. State-chart diagrams are used for modeling objects which are reactive in nature. A state machine portrays the sequences of states which an object undergoes due to events and their responses to events. StateвЂ“Chart DiagramsДЄ stateвЂ“chart diagram shows a state machine that depicts the control flow of an object from one state to another. The message is shown as a labeled arrow.Д®xample в€’ Collaboration diagram for the Automated Trading House System is illustrated in the figure below. The links that connect the objects are used to send and receive messages. Notations в€’ In these diagrams, the objects that participate in the interaction are shown using vertices. Collaboration DiagramsД¬ollaboration diagrams are interaction diagrams that illustrate the structure of the objects that send and receive messages. The messages that these objects send and receive are placed along the yвЂ“axis, in the order of increasing time from top to bottom.Д®xample в€’ A sequence diagram for the Automated Trading House System is shown in the following figure. The objects that initiate the interaction are placed on the xвЂ“axis. Notations в€’ These diagrams are in the form of two-dimensional charts. Sequence diagrams are interaction diagrams that illustrate the ordering of messages according to time. The control flow of organization using collaboration diagrams. The control flow by time ordering using sequence diagrams. Interaction diagrams are used for modeling в€’ There are two types of interaction diagrams в€’ They also include the messages passed between them. Interaction diagrams depict interactions of objects and their relationships. The system allows the manager to manage customer accounts and answer any queries posted by the customer. Once the customer places an order, it is processed by the sales department and the customer is given the bill. The trading house has transactions with two types of customers, individual customers and corporate customers. We assume the following features of the system в€’ Let us consider an Automated Trading House System.

To model the requirements of a system from the outside point of view. To model the context of a system by enclosing all the activities of a system within a rectangle and focusing on the actors outside the system by interacting with it. Relationships like dependency, generalization, and association.Use case diagrams present an outside view of the manner the elements in a system behave and how they can be used in the context. The following figure shows the notations of an actor named Student and a use case called Generate Performance Report. ActorДЄn actor represents the roles that the users of the use cases play. Use cases may be applied to the whole system as well as a part of the system.

It shows the interaction of things outside the system with the system itself. Use Case Model Use caseДЄ use case describes the sequence of actions a system performs yielding visible results. The behavioral diagrams are categorized as follows: use case diagrams, interaction diagrams, stateвЂ“chart diagrams, and activity diagrams. When properly applied (See Usage Notes below) Activity diagrams are recursively scalable and simulatable.UML behavioral diagrams visualize, specify, construct, and document the dynamic aspects of a system. The purpose of Activity diagrams is to specify dynamic system behaviors that Satisfy (В«satisfyВ» Dependency) system Functional Requirements using both Control and Object (data) Flows. compare and contrast: SA/SD DFDs, FFBDs, EFFBDs, IDEF0 BPMN BPDs.Data Blocks (i.e., Blocks that represent Persistent Data Stores) and Signals that contain Data Blocks can be Allocated to Activity Parameters and Action Pins.Activities and Actions can be Allocated (via to Partitions that represent Control Blocks (i.e., Blocks that represent the System, Subsystems, Sub-Subsystems.Activities (and indirectly Activity diagrams) can be recursively decomposed ('nested') by alternating between Activity definitions and Call Behavior Action usages (See Usage Notes below.).Object Flow = data flow of object inputs/outputs into/from an Activity or Action.ДЄctivity diagram (act): An Activity diagram shows system dynamic behavior using a combined Control Flow and Object (data) Flow model.Control Flow = flow of functional behaviors.Action = atomic Activity, which is a primitive executable behavior.Control and Object Flows can be sequential (default) or parallel (indicated by Fork & Join Nodes) depending upon conditions. What is a SysML Activity diagram? DefinitionsДЄctivity: An Activity (notation: rounded-rectangle or 'roundangle') represents a flow of functional behaviors that may include optional Object (data) Flows.