HIRA Masterclass - Session 3 of 12

DETERMINING LIKELIHOOD CONSISTENTLY


Monday 17 August 2026, 11:30–13:30 (UK time)


Likelihood is where safeguards live and where most risk assessments go wrong.


Should you reduce likelihood because you have a relief valve? What about an operator response to an alarm? How do you account for a safeguard that works 99 times out of 100 but fails on the 100th?


This session covers how to assess frequency with safeguards in place, why "unlikely" is not a number, and how to stop your team defaulting to gut feel when the data exists. Including the relationship between likelihood and LOPA.


2 hours. Live. £25.


1 free place available for students, university staff, or anyone currently unemployed. A first come, first served. Get in touch to apply.



Testimonial

"Louise explained everything in a very easy to understand way. She was patient and took time to answer all our questions."

IChemE Process Risk Assessment participant, 2023



What you get


  • 2 hours of live teaching with worked examples and discussion
  • Access to the session recording afterwards
  • A structured approach you can take back to your team on Tuesday morning
Louise Wilson CEng MEng CFSE FSaRS MIChemE
Founder, PSM Hub | President, Safety and Reliability Society


Chartered Engineer with 17 years of process safety experience. Over 400 days of HAZOP and LOPA facilitation across oil and gas, chemicals, pharmaceuticals, and mining. Former BP and Shell technical safety authority. Guest lecturer at Imperial College London and the University of Cambridge.

Want all 12 sessions?


Save £50 with the Full Year bundle. £250 for the complete HIRA Masterclass programme.

HIRA Masterclasses

12 sessions. 12 months. One structured journey from risk matrix fundamentals to auditing. The HIRA Masterclass is a monthly programme of live sessions designed to build practical, consistent risk assessment skills from first principles. Each session is 2 hours with worked examples and discussion. All sessions run 11:30–13:30 on the third Monday of each month, June 2026 to May 2027. £250 for all 12 sessions — save £50 compared to buying individually. Includes access to all recordings.

Courses: 12

£250