EXPERT SYSTEMS

Expert System

     “an expert system is a computer program that represents and reason s with knowledge of a specialized subject with a view to solving problems directly or giving advice”.

Advantages of Expert System

    Expert system works by storing expertise of a domain expert. Then a user can interact with the system and let it solve a problem using the same logic generally used by the expert. Usually the expert systems is faster and more accurate than a human , and does not get tired or bored. A very strong benefit of Expert Systems is being able to widely distribute the knowledge of a single expert , or being able to accumulate in one place the knowledge of several widely represented experts. Some situations when ES should be considered Only one expert is available , but is needed in multiple locations. Expertise is divided among several experts. Expertise is required is a harsh environment.

An expert is retiring. Expert systems are especially helpful when a task is performed only occasionally and the expert has to relearn the procedure each time it is performed . one can use expert systems are especially helpful when a task is performed only occasionally and the expert has to relearn the procedure each time it is performed. One can use Expert systems to standardize operations . another use for expert system is as job aid for experts. This will allow them to perform more accurately, more consistently, and faster , freeing up time for the expert to be more creative in performing the task. This is especially helpful when dealing with tedious, repetitious tsks. Thus an expert system is needed to

completely fulfill a function that normally requires a human expertise or it may play the role of an assistant to a human decision maker. An expert system can be distinguished from a more conventional application program in that:

     It simulates human reasoning about a problem domain, rather than simulate the domain it self.

      It performs reasoning over representations of human knowledge, in addition to doing numerical calculations or data retrieval.

    It solves problems by heuristic or approximate methods, which unlike algorithmic solutions are not guaranteed to succeed.

   Traditional program is termed as procedure oriented programming where as for an expert system term it as object – oriented programming.