Lecture Systems analysis and design with UML (3 e) Chapter 7 Behavioral modeling

Behavioral models describe the internal dynamic aspects of an information system that supports the business processes in an organization. In this chapter, we describe three UML 2.0 diagrams that are used in behavioral modeling: sequence diagrams, communication diagrams, and behavioral state machines.

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Chapter 7:

Behavioral Modeling

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PowerPoint Presentation for Dennis, Wixom, & Tegarden Systems Analysis and Design with UML, 3rd Edition

Objectives

• Understand the rules and style guidelines for sequence and communication diagrams and

behavioral state machines.

• Understand the processes used to create

sequence and communication diagrams and

behavioral state machines.

• Be able to create sequence and communication diagrams and behavioral state machines.

• Understand the relationship between the

behavioral models and the structural and

functional models.

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Key Ideas

• Behavioral models describe the internal

dynamic aspects of an information system that supports business processes in an

organization

• Key UML behavioral models are: sequence diagrams, collaboration diagrams, and

statechart diagrams

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BEHAVIORAL MODELS

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Behavioral Models

• Systems have static &dynamic characteristics

– Structural models describe the static aspects of the system

– Behavioral models describe the dynamics and

interactions of the system and its components

• Behavioral models describe how the classes described in the structural models interact in

support of the use cases.

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INTERACTION DIAGRAMS

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Interaction Diagram Components

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Sequence Diagram Syntax

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More Sequence Diagram Syntax

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Sample Sequence Diagram

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Steps to Build Sequence Diagrams

1 Set the context

2 Identify which objects will participate

3 Set the lifeline for each object

4 Lay out the messages from top to bottom of the

diagram based on the order in which they are sent

5 Add execution occurrence to each object‘s lifeline

6 Validate the sequence diagram

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BEHAVIORAL STATE MACHINES

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Behavioral State Machines

• A dynamic model that shows the different

states through which a single object passes

during its life in response to events, along with its responses and actions

• Typically not used for all objects

– Just for complex ones

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Components of State Machines

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State Machine Syntax

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Sample State Machine

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Steps to Build a State Machine

1 Set the context

2 Identify the initial, final, and stable states of

the object

3 Determine the order in which the object will

pass through the stable states

4 Identify the events, actions, and guard

conditions associated with the transitions

5 Validate the behavioral state machine

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CRUD ANALYSIS

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Sample CRUD Matrix

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