Expert System is a computer program or system that has the ability similar to human experts to make decisions and judgment. Expert system emulates the if-then pattern rather than procedural programming. Expert systems or programs are used to solve complex problems by capturing the knowledge from the knowledge base. All knowledge in the knowledge base is stored by human experts and Expert Systems are used by Non Expert humans to solve complex problems.
There are following characteristics of the Expert System :
* Expert Systems helps to spread the expertise of a human to many.
* Expert Systems provide more efficient solutions as the knowledge base contains the information from many human experts rather than single human.
* Cost is reduced with expert systems as less cost is involved as compared to consultants for problem solving.
* New facts can be reduced based on existing knowledge base facts so expert systems can solve complex problems.
* The Expert system is a permanent computer system as human experts are perishable or limited in life.
