Chapter18slides - Alternative Decision-Support Systems 1...

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1 Alternative Decision-Support Systems
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2 What is an expert system? ‘The modeling, within a computer, of expert knowledge in a given domain, such that the resulting system can offer intelligent advise or take intelligent decisions’ British Computer Society The system should be able to justify the logic and reasoning underlying its advice or decision making.
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3 Expert knowledge Knowledge elicitation – gaining knowledge from an expert This knowledge may consist of many unwritten rules of thumb Knowledge bottleneck – difficulty of eliciting expert knowledge and transferring it to a computer program
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4 Representing knowledge in expert systems Production rules: IF (condition in database) THEN (action to update the database) Control structure or inference engine: determines what rule is to be tried next Forward chaining: following pathways through from known facts to resulting conclusions Backward chaining: choosing hypothetical conclusions and testing to see if the necessary rules underlying the conclusions hold true
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This note was uploaded on 12/08/2011 for the course ENGINEERIN BURD taught by Professor Benni during the Fall '09 term at Uni. Reykjavik.

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Chapter18slides - Alternative Decision-Support Systems 1...

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