IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 6 - 6 of 46

Question 6


Appeared in Year: 2009

Describe in Detail


What are the main difference between conventional system and expert system?


  • Conventional systems are rule based systems. Rules are clearly defined and implemented in the programming language as to how the system should function and behave in certain condition.
  • An expert system is a computer system that emulates the decision-making ability of a human expert. Expert systems are designed to solve complex problems by reasoning through bodies of knowledge, represented mainly as if – then rules rather than through conventional procedural code.

Main Differences

Conventional System

  • Knowledge and processing are combined in one unit.
  • The system is operational only when fully developed.
  • The programme does not make errors, unless error in programming.
  • Step by step execution according to fixed algorithms is required.
  • It needs full information.

Expert System

  • Knowledge database and the processing mechanism are two separate components.
  • The Expert System may make a mistake.
  • The expert system is optimized on an ongoing basis and can be launched with a small number of rules.
  • Execution is done logically & heuristically.
  • It can be functional with sufficient or insufficient information.

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