An expert system approach to chemical hazard assessment.
Hazard assessment involves the retrieval of appropriate chemical hazard data and
the production of an assessment which complies with relevant regulations. This
is a complex process requiring detailed knowledge of chemical hazards and
hazard assessment regulations. The purpose of this project is to investigate the
use of an expert system approach for hazard assessment of complex systems.
The approach has focused on the design, development and evaluation of an
expert hazard assessor after appropriate modelling of chemical database retrieval,
and legislative knowledge base. An "intelligent form" was designed to link the
legislation to the chemical hazard data. To facilitate ease of use, the program was
extended to include an on-line help facility, and a user friendly interface to
address local and remote databases.
The feasibility and benefits of the Expert Hazard Assessor ( EHA ) have been
demonstrated through system testing and evaluation using sample regulations,
and available chemical data, by groups of inexperienced users. Comparison with
a previous standard expert system, also shows the EHA to be more
comprehensive in output, more efficient, easier to use for the non-expert
assessor, and provides better help support.
The results suggest that an EHA such as the one detailed in this work is of
significant benefit in providing appropriate hazard assessment.