Process Hazard Analysis (PHA)/HAZOP

Process Hazard Analysis involves using a systematic method to identify the risks associated with a process, as well as the most cost effective system improvements that maximize safety. We have direct experience in conducting PHA studies using any of the following methods:

  • Hazard and Operability Study (HAZOP)
  • What-If Analysis
  • Failure Modes, Effects and Criticality Analysis (FMECA)
  • Fault Tree Analysis (FTA)
  • Event Tree Analysis (ETA)
  • Checklists
  • Preliminary Hazard Analysis
  • Cause Consequence Analysis
  • System Reliability Analysis


  • Facilitated HAZOP Studies for each process unit within a major petroleum refinery.
  • Conducted Process Hazard Analyses for the Front End Engineering Design (FEED) of multiple facilities utilizing the HAZOP and What-If methodologies.
  • Performed PHAs utilizing one or more of the above methodologies for several hundred systems and processes in a variety of industries.

We are specifically experienced in the application of the following computer programs:

  • PHA-Pro
  • PHA-Works