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This course is offered for public live-streamed delivery. It is also available for in-house live-streamed delivery.

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Locations Dates Duration Tuition
Online (1:00pm EDT) May 22, 2024 4 hours $399
Online (1:00pm EDT) September 26, 2024 4 hours $399


Risk matrices are used widely in process safety to estimate risks posed by processes to help with decision making. For example, they are used in process hazard analysis (PHA) to determine the need for risk reduction. However, there are no standards for risk matrices. Companies develop their own without the benefit of established industry guidelines.

Risk matrices are deceptively simple but various pitfalls await even experienced users. Invalid risk estimates can result from poorly designed and improperly used risk matrices, which often pass unrecognized. The results of an otherwise well performed study may be invalidated by poorly designed and / or improperly used risk matrices.

This course provides guidance on constructing and using risk matrices to avoid these pitfalls. Attendees receive an electronic copy of the course materials.

What you will learn:

  • Guidelines for designing and using risk matrices
  • How to set the number and ranges of severity and likelihood levels
  • How to set risk levels for proper decision making
  • How to incorporate the ALARP principle
  • How to calibrate risk matrices for risk tolerance
  • How to construct risk matrices for both individual and group risk
  • How to assign severity and likelihood values consistently
  • How to address uncertainties in severity and likelihood estimates
  • How to address subjectivity in risk estimates


4 hours