Expert Systems

Expert Systems

1. An expert system is articifical intelligence, it is a piece of software which acts as human intelligence in a particular area.

2. Made up of 3 parts.

   • 1. User Interface - The non-expert makes a query to the system and receives advice, the user interface is designed to be easy to use.
   • 2. Knowledge Base - This is a collection of facts and rules, this information is provided by the human experts.
   • 3. Inference Engine - This acts as a search engine, the system searchs the knowledge base to match information to the user's query.

3. Where are they used?

   • Medical Diagnosis - the knowledge base would contain medical facts, the patients symptoms would act as the query and the advice would be a diagnosis.
   • Providing financial advice - the knowledge base would contain information about the financial history/progress of similar businesses in the past.

4. Disadvantages

   • Can't easily adapt to new circumstances (unable to process unexpected data).
   • Lots of effort and cost goes into producing them.

5. Advantages

   • Expert Systems do not get tired and so can work 24/7.
   • Makes rational decisions without emotional overhead.
   • Efficient way of getting answers.