Offshore drilling platform is a complex object, including a comprehensive automation system, each element of which is the source of the risk of accidents. Realization of these risks can lead to catastrophic consequences. To minimize the risks and their consequences, a method is required to identify and assess the risks of technological operations. Decision Support System implemeting the method and having been designed as an add-on for the centralized automated rig control system will allow to provide an increase in process efficiency due account of the probability of risks while they are managed.