By Anita Johri INFS 401 Spring 2012 DSS Vs Expert System By Anita Johri INFS 401 Spring 2012

What is DSS? Helps in decision making when trying to figure out solution for a non structured decision. Focuses on problems that are unique, non routine & rapidly changing. Spring 2012 Anita Johri - INFS 401

3 Components of DSS: Model Management Data Management User Interface Management Spring 2012 Anita Johri - INFS 401

Examples…of DSS: Spring 2012 Anita Johri - INFS 401

What is Expert System? Major roles of individuals who interact with the system Domain expert Knowledge engineer User The major components are: • Knowledge base • Working storage • Inference engine • User interface Spring 2012 Anita Johri - INFS 401

Problems in developing an ES: The expert is unable to communicate his/her ideas The expert is unwilling to communicate his/her ideas The expert is not available Can all the testing be accomplished? User acceptance Disadvantages of Rule-Based Expert Systems Common sense Creativity Learning Sensory Experience Degradation Spring 2012 Anita Johri - INFS 401

Advantages of ES Availability Cheaper Reduced danger Permanence Multiple expertise Explanation Fast response Unemotional and response at all times Spring 2012 Anita Johri - INFS 401

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? Does anyone know any examples of expert systems used in everyday life? Spring 2012 Anita Johri - INFS 401

Where are Expert System used? Aircraft accident investigations- GP1020 Computer Tool Robotic surgeries. more than 300 surgeries done. Scientist use Robots in space research/ or radioactive places where its not safe for humans to go. Interactive games : Chess, Wii Saya : Taking tech classes. (surprise, fear, disgust, anger, happiness and sadness) Triage – Medical Diagnosis (Medical Expert System) Patriot Missile Guidance System Radar identifies Scud missile System steers Patriot missile to intercepts Scud missile Laws of physics, expert knowledge about missile trajectory is captured in the system Spring 2012 Anita Johri - INFS 401

DSS Expert Systems Facilitates decision making Unstructured environment Alternatives may not be fully realized yet Extract or gain knowledge from a computer system Use goals and the system data to establish alternatives and outcomes, so a good decision can be made Automate decision making. The decision environments have structure The alternatives and goals are often established in advance. Inject expert knowledge in to a computer system. The expert system can eventually replace the human decision maker. Spring 2012 Anita Johri - INFS 401

References: http://worldacademyonline.com/article/25/367/dss_applications.html http://www.tech-faq.com/decision-support-system.html http://wiki.answers.com/Q/Different_between_expert_system_and_decision_support_system http://en.wikipedia.org/wiki/Decision_support_system www.google.com Spring 2012 Anita Johri - INFS 401