Process models are schematic representations of business processes and support analysis for process redesign. A process model may be enhanced with additional information to further improve its analytical value (e.g. costs, throughput times, etc.). To support analysis of human factors in manufacturing processes, this paper introduces a new extension that visualizes human physical risks (such as heavy lifting or repetitive work). An existing human risk analysis method is integrated with the activity elements of BPMN. This integration facilitates a process wide risk analysis of occupational risk factors. Based on this graphical representation, users can see where in the process workers may encounter physical risks that should be mitigated through process redesign. This paper reports on the systematic design of a conceptual solution which is implemented in MS Visio and then applied and evaluated in practice.