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Expert Systems

Expert Systems . Chris LaJoie , Chris Panton, and Kurt DeVaney. What is an Expert System?. A system that uses human expertise to make complicated decisions. Simulates reasoning by applying knowledge and interfaces. Uses expert’s knowledge as rules and data within the system.

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Expert Systems

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  1. Expert Systems Chris LaJoie, Chris Panton, and Kurt DeVaney

  2. What is an Expert System? • A system that uses human expertise to make complicated decisions. • Simulates reasoning by applying knowledge and interfaces. • Uses expert’s knowledge as rules and data within the system. • Models the problem solving ability of a human expert.

  3. 4 Components of an ES • Knowledge Base • Reasoning or Inference Engine • User Interface • Explanation Facility

  4. Expert System Structure Knowledge Based Rules Expert Interpreter Inference Engine Natural Language Interface Data base Context Set of facts User

  5. Knowledge Base • Represents all the data and information imputed by experts in the field. • Stores the data as a set of rules that the system must follow to make decisions.

  6. Knowledge Acquisition Expert System Knowledge Engineer Human Expert

  7. Inference Engine • Asks the user questions about what they are looking for. • Applies the knowledge and the rules held in the knowledge base. • Appropriately uses this information to arrive at a decision.

  8. Turbo Tax • Expert System designed to help users complete tax returns http://youtube.com/watch?v=5b7KhvQSNcY

  9. User Interface • Allows the expert system and the user to communicate. • Finds out what it is that the system needs to answer. • Sends the user questions or answers and receives their response.

  10. Explanation Facility • Explains the systems reasoning and justifies its conclusions.

  11. Does anyone know any examples of expert systems used in everyday life?

  12. The Patriot Missile • It does all the work of the stinger and sidewinder but faster, more efficient, from a longer range and without the need an expert.

  13. PATRIOT VS. SCUD Missile http://youtube.com/watch?v=T68K3Twrm20&feature=related

  14. Medical Diagnosis & Expert Systems • Pathology is the study of the origin, nature, and course of diseases. • Pathology reports explain the outcomes of tests on the patient and the diseases various information. • Pathologists were in need of a comprehensive interpretative service to help them interpret these reports.

  15. PEIRS • PEIRS (Pathology Expert Interpretative Reporting System) was created as a user-maintained expert system for automating the interpretation of chemical pathology reports. • The system uses over 2500 rules to generate interpretive comments on the reports.

  16. Expert System Application in Everyday Life http://expertise2go.com/webesie/wine/

  17. Ethical Implications • Do you want to put a decision about your life in the hands of a computer? • When do you think you’d trust a computer’s judgment over a doctors?

  18. Problems with Expert Systems • There is no expert in the field • The expert is unable to communicate his/her ideas • The expert is unwilling to communicate his/her ideas • The expert is not available • Must have all information on a subject • Can all the testing be accomplished? • User acceptance

  19. An information system that utilizes analytical modeling and helps executives make strategic decisions DSS is user-driven and rely on the knowledge possessed by its user What is a Decision Support System?

  20. DSS vs. Expert Systems • DSS uses analytical modeling for decision making • Expert Systems are interactive and make decisions for you

  21. Advantages of Expert Systems • Can be simple to use • Efficient results • Accurate results • Adaptation and adjustments to changing conditions • Cost effective

  22. Questions?

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