ChemReg: Using Case-Based Reasoning to Support Health and Safety Compliance in the Chemical Industry

Kirk D. Wilson

ChemReg is a large knowledge-based system used by Air Products and Chemicals, Inc. to support compliance with regulatory requirements for communicating health and safety information in the shipping and handling of chemical products. This presentation concentrates on one of the knowledge bases in this system: the case-based reasoner. Previously written knowledge bases for generating shipping descriptions and material safety data sheets mapped classificatory rules directly into knowledge base code. To support regulatory compliance, however, this strategy required estimates to be entered for all hazard-related properties on every product. To alleviate this burden an automated case-based reasoner was written that generates estimates of hazard data from similar products using the existing product data base as its case library. While some refinements remain, the performance of the case-based reasoner has met expectations.

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