glossary-term: Hazard and Risk Analysis

  • May 6, 2025
    TMEL sets the acceptable frequency for a hazardous event. It links company risk targets to SIL determination.
  • May 6, 2025
    This method combines numbers and categories—like likelihood rankings and consequence levels—to estimate risk and prioritize hazards.
  • May 5, 2025
    A Risk Matrix maps severity and likelihood of events on a grid to support SIL selection or risk decisions.
  • May 5, 2025
    QRA assigns numerical values to risk. It models event frequencies and consequences to guide safety design.
  • May 5, 2025
    PHA is the U.S. term for structured hazard reviews like HAZOP. In IEC terms, this falls under Hazard and Risk…
  • May 5, 2025
    The PEAR Model evaluates risk across four impact categories—used in prioritizing hazards and assigning SILs.
  • May 5, 2025
    A Major Accident causes serious harm to people, environment, or property and often triggers regulatory reporting.
  • May 5, 2025
    An Initiating Event is the first failure or condition that could lead to a hazardous situation—such as valve failure or…
  • May 5, 2025
    HAZID is a structured brainstorming process to identify hazards early in a project. It often precedes HAZOP.
  • May 5, 2025
    HAZOP is a systematic method to find design deviations using guide words like “high” or “reverse” to uncover hazards.