Resources
Hazard Matrix
A category based method for assigning a safety integrity level (SIL). The user must create a matrix that assigns defined categories to the consequence (one axis dimension) and likelihood (other axis dimension) components of the risk with a SIL assignment associated for each entry in the matrix. In some cases, quantitative tools, such as LOPA, are used to assist the analyst in determining which category to use, but often the assignment is done qualitatively, using engineering judgment.