PROTOTYPE FOR INTEGRATED HAZARD ANALYSIS

The prototype of an integrated hazard-analysis system (IHAS) was devel oped. Essentially any process can be analyzed with this software if th e system topology is correctly supplied by the user. Since all algorit hms adopted are digraph-based, the system digraph must be constructed first with IHAS. The embedded feedforward and feedback loops are then identified and classified. On the basis of this information, three wid ely accepted hazard-assessment procedures- FTA, ETA, and HAZOP-can be performed automatically. From the results obtained in practical applic ations one can sec that the quality of hazard analysis is indeed impro ved if IHAS can be used as an aid to the human experts.