interaction & acivity diagram

8/8/2019 Interaction & Acivity Diagram

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Activity, Collaboration, and

Component Diagrams

Philip Liew

[email protected]


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Activity Diagrams

Represent the business and operational

workflow of a system

Shows activity, and event that causesobject to be in particular state


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Symbols

Starting point

First activity of the flow

Activity

Decisions


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Symbols

Signals (input and output)

Concurrent activity

Final activity


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Activity Example


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Sequence Diagrams

Depicts a sequence of actions that occur

in a system

Captures invoked methods of objects, andorder of invocation

Represents dynamic behaviour of system


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Sequence Symbols

Object is an instance of a class

Name to the left of : is objectname

Name to the right of : is classname

Arrows represent messages Simple messages

Special message creating object Special message destroying object

Message response


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Sequence Diagram

Horizontal object shows life of represented

object

Vertical axis represents sequence ofinvocation of object


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Sequence Diagram Skeleton


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Collaboration Diagram

Sequence diagram is time ordered

Like activity diagrams but shows

association with other objects in thesystem


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Elements

Object

Relation/Association

Message

Number represents order ofinteraction


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Component Diagram

Represents Implementation perspective

Reflect grouping of different design

elements of system


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Component Elements

Component

Interacting objects within system

Class/Interface/Object

Relation/Association


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Component Diagram Example


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Deployment Diagram

Represents physical relationships among

software and hardware components as

realized in running system

Nodes represent computational elements

(i.e. processor, server, etc.)


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Deployment Diagram Skeleton


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Example


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Example


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Courseware Example

Construct the design elements for a system that can beused to manage courses/classes

The organization offers a courses in areas such aslearning management techniques and understanding

different software languages and technologies Each course consists of a set of topics

Tutors assigned courses to teach according to theirspecialty and availability

Publishes and maintains calendar of courses andassigned tutors

Course Administrators who manage content, assigncourses to tutors, and define schedule


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Identify Actors

Tutors

Course Administrators

Students Course Administrator is main actor


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Use Case

Manage courses

View courses

Manage topics for a course

Manage course information

Manage course assignments

View course calendar

View tutors Manage tutor information

Assign courses to tutors


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Use Case


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Class Diagram


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Activity Diagram


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Sequence Diagram


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Collaboration Diagram


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Component Diagram

interaction & acivity diagram

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