What is an Expert System?An expert system is a computer program that is designed to solve complex problems and to provide decision-making ability like a human expert. It performs this by extracting knowledge from its knowledge base using the reasoning and inference rules according to the user queries. Show
The expert system is a part of AI, and the first ES was developed in the year 1970, which was the first successful approach of artificial intelligence. It solves the most complex issue as an expert by extracting the knowledge stored in its knowledge base. The system helps in decision making for compsex problems using both facts and heuristics like a human expert. It is called so because it contains the expert knowledge of a specific domain and can solve any complex problem of that particular domain. These systems are designed for a specific domain, such as medicine, science, etc. The performance of an expert system is based on the expert's knowledge stored in its knowledge base. The more knowledge stored in the KB, the more that system improves its performance. One of the common examples of an ES is a suggestion of spelling errors while typing in the Google search box. Below is the block diagram that represents the working of an expert system: Note: It is important to remember that an expert system is not used to replace the human experts; instead, it is used to assist the human in making a complex decision. These systems do not have human capabilities of thinking and work on the basis of the knowledge base of the particular domain.Below are some popular examples of the Expert System:
Characteristics of Expert System
Components of Expert SystemAn expert system mainly consists of three components:
1. User InterfaceWith the help of a user interface, the expert system interacts with the user, takes queries as an input in a readable format, and passes it to the inference engine. After getting the response from the inference engine, it displays the output to the user. In other words, it is an interface that helps a non-expert user to communicate with the expert system to find a solution. 2. Inference Engine(Rules of Engine)
Inference engine uses the below modes to derive the solutions:
3. Knowledge Base
Components of Knowledge Base
Knowledge Representation: It is used to formalize the knowledge stored in the knowledge base using the If-else rules. Knowledge Acquisitions: It is the process of extracting, organizing, and structuring the domain knowledge, specifying the rules to acquire the knowledge from various experts, and store that knowledge into the knowledge base. Development of Expert SystemHere, we will explain the working of an expert system by taking an example of MYCIN ES. Below are some steps to build an MYCIN:
Participants in the development of Expert System There are three primary participants in the building of Expert System:
Why Expert System?Before using any technology, we must have an idea about why to use that technology and hence the same for the ES. Although we have human experts in every field, then what is the need to develop a computer-based system. So below are the points that are describing the need of the ES:
Capabilities of the Expert SystemBelow are some capabilities of an Expert System:
Advantages of Expert System
Limitations of Expert System
Applications of Expert System
Next Topic# What is the known expert system?An expert system relies on having a good knowledge base. Experts add information to the knowledge base, and nonexperts use the system to solve complex problems that would usually require a human expert. The process of building and maintaining an expert system is called knowledge engineering.
Which is component of an expert system?An expert system generally consists of four components: a knowledge base, the search or inference system, a knowledge acquisition system, and the user interface or communication system.
What is the use of DENDRAL expert system?Dendral was a project in artificial intelligence (AI) of the 1960s, and the computer software expert system that it produced. Its primary aim was to study hypothesis formation and discovery in science.
What is the well known expert system for medical diagnosis system?The expert system can be used to assist a physician in diagnosing medical problems of a patient or else be used in the interpretation of medical test results. A classical medical diagnosis expert system is the MYCIN.
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