1. IDEF0 Modelling techniques
SDLC - Analysis
IDEF0 Modelling techniques

2. Why model processes? Modelling provides: Modelling costs:
consensus on the form of existing processes
consensus on what is to be changed
Modelling costs:
lots of time
lots of effort

3. Modelling technique
Dynamic technique to support the capture of process knowledge
BPWin
computer based tool that encapsulates particular syntax
rules and symbols used to create the model

4. Architecture of processes
Manage Processes
Operate Processes
Support Processes
Set Direction
Formulate Strategies
Direct Business
Get Order
Develop Product
Fulfil Order
Support Product
Manage Finance
Support Personnel
Manage Technology
Corporate Learning

5. Operate processes

6. IDEF0 introduction Background Activities ICOMs Decomposition
Consistency
Node index
IDEF0 Rules

7. IDEF0 background US military system analysis tool
Developed during the 1970’s
Part of Polaris programme
Used to model missile development activities
Modified for business use
IDEF0, IDEF1.x, IDEF2, IDEF3

8. IDEF0 - activities What is actually done in the system order Get order
Develop product
design
product
Fulfil order
Support product
support

9. IDEF0 - ICOMs Inputs - physical or informational
Output - physical or informational
Mechanism - enables activity to occur
Control - governs activity / transformation

10. IDEF - the box Activity (verb) Trigger / Control (noun) Output (noun)
Input (noun) A1
Mechanism (noun)

11. IDEF0 - Context diagram C 1 I 1
Activity
(verb) O 1 A1 M 1
A-0

12. IDEF0 - Top Level C 1 I 1 A1 A2 A3 O 1 A4 A0 M 1

13. IDEF0 - Decomposition A1 A2 A3 A4
A41
A42
A43

14. IDEF0 - Node Tree A0 System Transformation A1 High level process 1
A21 sub process 1
A22 sub process 2
A23 sub process 2
A3 High level process 3

15. IDEF0 - Rules Every box must have a control
One diagram per page, 3-6 boxes
Activities must be described by verbs
All arrows must be labelled, including decomposed arrows
Arrows may join or divide
Arrows may be combined at higher levels and decomposed at lower levels

16. IDEF0 - the process What activities are being performed
What inputs are being transformed into what outputs
What influences/controls/triggers/ regulates/constrains these activities
What means are required to perform these activities