Sequence Diagrams with Lifelines, Constraints and other Specifications

Sequence diagrams (sd) = used to express information about system’s dynamic behavior, by using elements called lifelines to model participants in the system behavior and use messages between lifelines to model the interactions. This view expresses sequences of behaviors and events over time. This is an ideal diagram when wanting to display how blocks interacts […]

Modeling Flow-Based Behavior with Activities

Activity Diagram = frame represents an activity; [1]What is the diagram kind of the activity diagram?diagram kind of “act” for activity; has following form: act [Activity] activity name [diagram name] Activity name = name to represent the activity; Diagram name = user defined name to describe purpose of diagram;   [2]How are an action and […]

Activity Diagrams and Properties

Activity Diagram (act) = one of three ways to express information about system’s dynamic behavior (activity, sequence, state machine), it’s a dynamic view of the system that expresses sequences of behaviors and event occurrences over time. (whereas a structure diagram like BDD, IBD and parametric diagrams show static views that convey no sense of time […]

Activity Modeling and relating to Block Diagrams

Interruptible region = subset of actions within activity that can interrupt execution of activity via interrupting edge; noted by dashed line around activity nodes; an interrupting edge is noted by lightning bolt symbol; [21] interrupting edge node is within the interruptible region and this has to be triggered to exit the interruptible region;     […]