A HAZOP is a team-based process hazard analysis (PHA) method. Its purpose is to identify hazards and operability issues in a process design. HAZOPs are not fun! Maybe that's not a problem, but they also don't achieve what they could and that is a problem.
Why Don't We Learn What We Should From HAZOPs?
HAZOPs are not as effective as they should be for several reasons, including:
- Tunnel Vision - The focus on small nodes obscures the big picture.
- Guideword Excess - Flow, pressure, temperature, and level are not independent.
- HAZOPs are supposed to identify operability issues, but they really don't explicitly address operability.
- Risk assessment in HAZOPs is typically difficult, ambiguous and not repeatable.
- HAZOP reports are difficult to read and are of limited use.
- Most people don't enjoy HAZOPs and that impacts participation.
The GATE Stream-based HAZOP process avoids these pitfalls via some novel modifications to the process.