A Rule-Based Expert System Guide on Uncertainty for Metrologists |
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| Walter J. Giardini, Kishor Dabke |
- Abstract:
- A rule based expert system (ES) has been implemented, which acts as a tutor to measurement scientists and technicians (metrologists) in the calculation of the uncertainty of measurements according to the methodology of the ISO "Guide to the Expression of Uncertainty in Measurement" (ISO Guide). The ES was implemented with the expert system shell/inference engine, "VP-Expert" (VPX) running in a DOS window. The intended target users are experienced metrologists, who lack the mathematical skills and concepts, particularly in statistical and sensitivity analysis, to implement the ISO-GUM document correctly. The ES guide uses seven main knowledge bases with a total of about four hundred rules. It allows a full, guided evaluation of the uncertainty of a measurement and uses a text-based tutoring knowledge base which is accessed either in a generic browse mode, or a context-sensitive mode based on the status of the current calculation. The ES uses background variables to maintain a consultation across knowledge bases and between interrupted sessions. The software implementation of this training is used as an analytical tool to make explicit and systematically specify the categorization and structure of the ISO Guide's fact-based and process-based knowledge content.
- Keywords:
- rule based expert system
- Download:
- IMEKO-TC1-2001-004.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC1
- Event name:
- TC1 Workshop 2001
- Title:
Workshop and Symposium on Virtual and Real Tools for Education in Measurement
- Place:
- Enschede, NETHERLANDS
- Time:
- 17 September 2001 - 19 September 2001