HAZOP, QRA and other PHA studies

Process Hazard Analysis (PHA) is a thorough, orderly, and systematic approach for identifying, evaluating, and controlling the hazards of processes.

The process hazard analysis methodology selected must be appropriate to the complexity of the process and must identify, evaluate, and control the hazards involved in the process.

The process hazard analysis shall address the following:

  • The hazards of the process
  • The identification of any previous incident that had a likely potential for catastrophic consequences
  • Engineering and administrative controls applicable to the hazards and their interrelationships
  • Consequences of failure of engineering and administrative controls
  • Stationary source siting
  • Human factors and
  • A qualitative evaluation of a range of the possible safety and health effects of failure of controls.
A Process Hazard Analysis (PHA) team includes process safety specialist, engineers, operators, supervisors and other workers who have knowledge of the standards, codes, specifications and regulations which apply to the process being studied.

PHA Services Offered by Chola MS Risk:
  • Hazard and Operability Study (HAZOP)
  • Hazard Identification Study (HAZID)
  • Bow-Tie Analysis
  • What-If Analysis
  • Quantitative Risk Assessment (QRA).
Hazard & Operability Study (HAZOP)HAZOP study is to carefully review a process or operation in a systematic manner to determine whether deviations from the design or operational intent can lead to undesirable consequences. This technique can be used for continuous or batch processes….Read More >>


Quantitative Risk Assessments (QRA)Risk Analysis techniques provide advanced quantitative means to supplement other hazard identification, analysis, assessment, control and management methods to identify the potential for such incidents….Read More >>


Hazard Identification Studies (HAZID)HAZID (Hazard Identification) is a qualitative technique for the early identification of potential hazards and threats effecting people, the environment, assets or reputation. The major benefit of a HAZID study is to provide essential input to project development decisions…..Read More >>


Bow-Tie AnalysisBow tie analysis is a hazard analysis technique which is combination of fault tree analysis (FTA) and event tree analysis (ETA). Fault tree analysis (FTA) is identifying basic events that can lead to an accident event, where as Event tree analysis (ETA) is identifying the event sequences …..Read More >>

What-If AnalysisThe What-If Analysis technique is a brainstorming approach in which a group of experienced people familiar with the subject process ask questions or voice concerns about possible undesired events.The purpose of a What-If Analysis is to identify hazards, hazardous situations…..Read More >>


Risk AnalysisHazard Identification: Identifying sources of potential accidents involving release of hazardous material in the atmosphere.Consequence Assessment: Estimating the probable zone of impact of accidents as well as the scale and / or probability of damages with….Read More >>

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