This volume attempts to link the science of risk analysis with the currently ongoing movement on the use of stakeholders' processes. It is intended to assess the current practice of risk engineering, and to address the potential interactions with stakeholders' processes. New type models for risk screening and prioritisation at plant and regional levels are presented using fuzzy sets. The advent of integrated risk assessment Decision Support Systems in connection with stakeholders' processes, and their interactions, are put into a practice perspective for today's developments in risk engineering.