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For more information about this area, please contact:

Russ Tronstad
Extension Economist

Phone: (520) 621-2425
Email: tronstad@ag.arizona.edu

 

 

An Example Fuzzy Expert System

Step 3 -- Define Decision Rules

For example an expert might define the following common sense rules:

    Rule 1 if protein is low and energy is low then feed is high
    Rule 2 if protein is low and energy is high then feed is low
    Rule 3 if protein is high and energy is low then feed is high
    Rule 4 if protein is high and energy is high then feed is low
Note:
These rules are defined in simple language terms. There are no decisions to be made about breakpoints (i.e. energy less than 3.45 versus 4.25). There are no decisions to be made about the functional form of the relationships. The rules can be understood at a common sense level. At the same time these rules result in specific and repeatable (same inputs gives same output) results.

Our expert could have saved computational effort by defining two rules "if energy is low then feed is high" and "if energy is high then feed is low." However for the purpose of the example we will stick with the four rules.

 

 

 


Step 2


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© 2007 Dept. of Agricultural & Resource Economics, The University of Arizona
Send comments or questions to arecweb@ag.arizona.edu

Last updated September 17, 1999
Document located at http://ag.arizona.edu/arec/fuzzy/ex-rules.html