Data Flow Diagram Symbols

ProcessStep-by-step instructions

Data flow

External agent

Data storeData at rest

Real-time link

Satzinger et al. Fig 6-2

Satzinger et al. Fig 6-5

Layers of DFD Abstraction

Decomposition DiagramsA decomposition diagram or hierarchy chart shows the top-down, functional decomposition of a system.

RML: Basic constructs• Class concepts (sets) and individual

concepts (elements)• Individuals are members of a class

RML: Relations

• Cardinality: Full (filled circle) vs Partial (no circle)• Coverage: 1 (arrowhead), N (no arrow), max (numeric)

RML: Abstraction constructs

Detailed resource properties

Actor Tool Object

OrganizationalActor Agent

ManualTool

SoftwareTool

InvokedSoftware

Tool

SoftwareAgent

MaterialObject

InformationObject

ActiveInformation

Object

PluggableAction

DefinitionRole ConcreteInvoked

ApplicationSoftwareresource

Compositeresource

Ax

name

Conference Arrangement CaseInformation Submodel

ConferenceWorkspace (CW)

Forms PersonDB

CFPAuthors

CFPJounals

ResponseRecieved

PaperRecieved

PaperAccepted

PaperRejected

ReviewerReminder

PotentialParticipants (pid)

PotentialReviewers (r#) Contents

1..N

Letters ofIntent

ReviewReport (r#)

Papers (p#)Sessions (s#)

0..N1..N

Legend:

p# paper ids# session idch# chair idr# reviewer idpid person idp#* repeated paper idr#* repeated reviewer id

1..N

ReviewForm

Too lateresponse

AdmInfo(p#, s#, r#*, ..)

ReviewResults

AdmInfo(ch#, s#, p#*, ..)

Use Case Name:

Summary:

Basic Course of Events:

Alternative Paths:

Exception Paths:

Event Driven Process Chains(EPC)

EPC and viewpoints