MYCIN

• by Ed Feigenbaum, Bruce Buckanan, and Dr. Edward Shortliff at Stanford
• diagnosis and treatment of blood infections
• about 450 rules
• perfored as well as some experts, considerably better than junior doctors
• utilized uncertainty factors

PROSPECTOR

• recommeded exploratory drilling at geological site that turned out to contain significant amounts of molybdenum
• uses probabilistic reasoning, based on uncertainty factors

XCON

• design configurations of computer components at Digital Equipment Corporation
• several thousand rules
• uses forward chaining

More recent work

• Reasoning in expert systems is simple and unsophisticated
• Modern models use more complex models, probabilistic reasoning systems, involving more sophisticated mathematics

created May 14, 2003 last revised May 14, 2003

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