Retrieved 5 March 2015. Potential problems with HAZOPs (authors sell HAZOP expertise, so presumably some promotional intent, but the issues described are genuine/recognisable) https://www.bureauveritas.co.uk/industrial-risk-management/workshop-facilitation/hazard-and-operability-study-hazop HAZOP Explained, from Primatech, Inc. HAZOP Fundamentals a White Paper from Primatech Inc.