IDEF Basics

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IDEF Basics Presentation to XMSF SG Fall 2004
SIW 22-24 September 2004 Roy ScrudderChair, HLA
Evolved Product Development GroupApplied
Research Labs, Univ of TXscrudder_at_arlut.utexas.ed
u512.835.3857
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Topics

• What is IDEF?
• A bit of History
• The IDEF Standards
• IDEF0
• IDEF3
• IDEF1X

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IDEF History

• A series of graphical notations (just like UML is
  a series of notations)
• Originated in the 1970s.
• Originally brought together (but not integrated)
  through the USAF Integrated Computer Aided
  Manufacturing (ICAM) project as ICAM Definition
  (IDEF) languages
• Subsequently renamed as Integration Definition
  (IDEF) Languages

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IDEF Languages

• IDEF0 Activity Modeling
• IDEF1 Data modeling (not in use)
• IDEF1X Data modeling
• IDEF1X97, aka, IDEFObject, aka IEEE 1320.2 Data
  modeling with O-O extension
• IDEF2 Simulation Modeling (dynamics model)
• IDEF3 Process capture method
• IDEF4 Object-Oriented Design Method
• IDEF5 Ontology Description
• 99 of the time when someone talks about their
  IDEF they mean IDEF0 and IDEF1X (and theres no
  way to know which one)

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IDEF0 Activity Modeling Language

• Originated in the commercial sector as Structured
  Analysis Design Technique (SADT)
• Standardized as FIPS 183,
• later withdrawn, NIST did not want to duplicate
  industry standards
• Heavily used in DoD
• DoD Architecture Framework OV-5, Operational
  Activity Model
• Support the structured decomposition of processes
  and associated data.

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IDEF0 Activity Model
sales policy
postal regulations
rejected order
order
Receive Orders
order details
shipping details
shipment
Ship Orders
shipping confirmation
invoice
Receive Payments
payment
packaging machine
accounting software
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IDEF0 Model Components

• CONTROL
• Data that restricts or provides direction for an
  activity
• Required for every activity

• OUTPUT
• Information or materials produced by the activity
• Required for every activity

• INPUT
• Information or materials used to produce activity
  outputs
• Not required for every activity

Activity

• MECHANISM
• Performs the activity (people, machines, systems,
  etc.)
• Required for every activity

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An Alternative to Activity Modeling

• Yourdon/DeMarco Dataflow Diagram

External System
Process
Data Flow
Data Store
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IDEF3 Process Capture Method
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IDEF3 Notation Elements
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IDEF1X Data Modeling Language

• Integration Definition for Information Modeling
  (IDEF1X)
• Originated in the commercial sector
• Standardized as FIPS 184
• Heavily used in DoD
• DoD Architecture Framework
• Core Architecture Data Model states in IDEF1X
• OV-7, Logical Data Model calls for stating an
  overall data model, IDEF1X commonly used
• Command and Control Data Model (C2IEDM) stated in
  IDEF1X

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IDEF1X Based on the Relational Model
One Value per Cell
EMPLOYEE
Emp-ID
Emp-Name
Emp-Address
D99001
John Smith
101 Main Street
D99002
Mary Jones
205 Fifth Street
D99007
Ralph Mertz
11A Snark Street
LABOR HOURS
Emp-ID
Week-Ending
Hours-Worked
Unique Identification
D99001
07 Oct 93
40
D99001
15 Oct 93
50
D99007
07 Oct 93
40
Data Migration
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IDEF1X Data Model
CUSTOMER
LOCATION
PRODUCT
customer-id
product-no
bldg-no
customer-name customer-address
product-name
bldg-address
PRODUCT-INVENTORY
PURCHASE ORDER
customer-id (FK) po-no
product-no (FK) bldg-no (FK)
PO-LINE-ITEM
product-no (FK) customer-id (FK) po-no (FK)
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IDEF1X Notation Elements
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Types of Data Models Models
ENTITY-RELATIONSHIP DIAGRAM
AREA MODELS
LOGICAL MODELS
KEY-BASED MODEL
FULLY ATTRIBUTED MODEL
FULLY ATTRIBUTED MODEL
FULLY ATTRIBUTED MODEL
PROJECT MODELS
TRANSFORM MODEL
TRANSFORM MODEL
TRANSFORM MODEL
PHYSICAL MODELS
DBMS MODEL
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Entity-Level Data Model
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C2IEDM Fully-Attributed Data Model
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C2IEDM Candidate Target List Subject Area