The risk-based testing (RBT) umbrella: risk matrix and risk register authoring, likelihood x impact scoring, risk storming, calibration, and risk-to-test coverage mapping. Produces the per-feature / per-release matrix artifact (structured intake: feature, category, impact 1-5 by likelihood 1-5, score; heatmap; mitigations with owners and due dates), supporting lightweight and heavyweight (FMEA / Cost of Exposure) methods per RBT canon, plus a risk coverage mapping workflow that proves which tests, cases, or monitors back each registered risk. references/ carries the product-risk and project-risk register variants, the risk-storming facilitation guide, matrix calibration against observed defect data, and a register review checklist. Use for any risk-based-testing artifact: building a matrix or register, running a risk-storming session, calibrating ratings against defects, or mapping risks onto test coverage.