6. IDEF Modeling of Corporations
• IDEF is a diagramming method used to describe systems.
• developed by ICAM (Integrated Computer Aided Manufacturing)
• Three (3) levels of IDEF models:
IDEF0: model of process flows
IDEF1: modeling of the nature of data handling
IDEF2: modeling of the dynamic behavior of a process
• We will examine IDEF0 for modeling processes. Other models would be useful when designing complex information systems.
• A process can also be represented with an IDEF0 diagram.
• IDEF serves to illustrate the relationship of all processes in a system in a graphical format
• Boxes represent activities or functions.
• Information or data needed to carry out the activities or products produced by the activities are represented by arrows.
• A top down diagramming method is used.
• The model starts off with a single block that represents the entire system or process.
• The first block diagram is “expanded” to more detailed diagrams or processes.
• The collection of successively more detailed diagrams is the IDEF model
• This is the top level of the IDEF model.
• This box is labeled as A0 (“0” indicates the top level)
• Decomposing “A0” will produce another set of boxes and process flows.
Problem 6.1 In the Shop Floor Production Model (SFPM), a PLC connected to a robot, NC machine and safety systems would be considered,
a) Section/Area Control (Level 4)
b) Cell Control (Level 3)
c) Station Control (Level 2)
d) Equipment Control (Level 1)
Answer 6.1 c
Problem 6.2 In the IDEF0 diagram below,
a) there are more than 10 problems
b) there are 6 to 10 problems
c) there are 1 t o 5 problems
d) there are no problem
Answer 6.2 b
Problem 6.3 Draw an IDEF diagram to describe how you study for, and write an exam.