Goal-directed expert system

Development of a linked network of expert systems, EXMAT, has been described for application to materials characterization. Selected instrumentation which are common to modern laboratories generate databases that are treated and interpreted within an analytical strategy directed toward a desired goal. Extension to other problem-solving situations may use the same format, but with specialized tools and domain-specific libraries. Importantly, a chemometrician s expertise has been embedded into EXMAT through access to information derived from a linked expert system,... 

In the second example, the scientist began with a set of facts and was looking for all possible conclusions. The goal-directed approach to this problem would be to attempt to prove whether each one of the millions of compounds reported in the chemical literature could be responsible for the observed spectrum. Again, the structure of the problem determines the structure of the expert system. 

Expert systems can be designed to achieve this goal by comparing the analytical response with previously defined upper and lower threshold values. Samples with analyte concentrations within these values can be directly quantified, whereas excessively concentrated or diluted samples should be handled under modified dispersion conditions. Feedback... 

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