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Expert Systems
February2008
Standard Grade Computing
Slide 1
Artificial Intelligence is a program
which makes a computer behave as if it
had a form of intelligence.
An Expert System is a program
that has access to a large database
or knowledge about one particular
subject.
February2008
Standard Grade Computing
Slide 2
Expert Systems draw conclusions,
make decisions and offer advice based
on knowledge.
Expert Systems contain the
knowledge of human experts.
February2008
Standard Grade Computing
Slide 3
Expert Systems can be used in –
•Medicine
•Geology
•Car maintenance
•Archaeology
•Chemistry
•Engineering
•Robotics
February2008
Standard Grade Computing
Slide 4
An Expert Systems would be
needed to produce an
intelligent robot.
Intelligent Robots
(e.g. ASIMO developed by
Honda) are programmed to
behave as though they had a
form of intelligence.
February2008
Standard Grade Computing
Slide 5
Advantages of Expert Systems •Can be copied many times
•Are always accessible
•Are consistent in their decision making
•Contain knowledge from more than one person
•Save money by allowing unskilled workers to perform
complex tasks
•Provide an impersonal source of advice
February2008
Standard Grade Computing
Slide 6
Disadvantages of Expert Systems •Expensive to create
•Cannot use common sense like humans
•May lack depth of knowledge
•Are inflexible
•Cannot skip steps
•May contain mistakes
February2008
Standard Grade Computing
Slide 7
Social Issues of expert systems
include deskilling.
Legal Issues of expert systems
include blame and compensation
claims.
Ethical Issues of expert systems
examine whether or not vital
decisions should be left to machines.
February2008
Standard Grade Computing
Slide 8