What Are Expert Systems

However, there is a difference between conventional software algorithms and expert systems. Whereas conventional algorithms have a clearly defined result, an expert system may provide no answer or just one with a certain probability. The methodology used here is heuristic programming, and, depending on the point of view, the terms expert system and knowledge-based or rule-based system are often used synonymously. 

Many expert systems contain a knowledge base in the form of a decision tree that is constructed from a series of decision nodes connected by branches. For instance, in expert systems developed for the interpretation of vibrational spectra, decision trees are typically used in a sequential manner. Similar to the interpretation of a spectrum 

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