Requirements engineering must manage the risks arising from project stakeholders. The Outcome-Based Stakeholder Risk Assessment Model (Obsram) provides guidance in stakeholder identification, identification of stakeholder impacts and perceptions, identification of potentially negative responses that pose risks to the project, and assessment and prioritization of those risks. This information provides valuable input to a risk mitigation plan that let you devote more resources and attention to the stakeholders that pose the greatest risk to your project. A case study offers a practical, step-by-step approach to this process. This article is part of a special issue on stakeholders in requirements engineering.