3 min read

Hazid, Hazan and Hazop are all part of Safety and Risk Management. Hazard, Hazid (hazard identification), Hazan (hazard analysis), and Hazop (hazard and operability studies) are important safety and risk management techniques which can be applied in any industry to address, reduce or eliminate hazards.

Click to Acquire Health & Safety Management Systems (OH&SMS) - ISO 45001 Implementation Kit


HAZAN represents hazard analysis. It considers system state (e.g. operating environment) as well as failures or malfunctions. It involves identifying the undesired events that lead to the occurrence of hazard, the analysis of the mechanisms by which the undesired events could occur, and the estimation of the consequences. It is the application of numerical methods to obtain an understanding of hazards in terms of:

  • How often a hazard will manifest itself,
  • And the consequences for people, process and plant.

Click for SWOT Manager Software

It is referred as the prerequisite for the complete risk assessment process, which involves first analyzing the hazards and then go on to assess the risks they present and determining what, if any, control measures should be taken.

Click to Acquire Health & Safety Management Systems (OH&SMS) - ISO 45001 Implementation Kit


HAZOP stands for hazard and operability (Hazop). It is designed to review hazard identification, and the identification of deficiencies in design which may lead to operability problems. It identifies irregularities in the working environment, enabling the root causes of the abnormalities to be pinpointed. It is associated with comprehensive and complex workplace operations, which, if malfunctions or irregularities were to occur, could lead to significant loss, in terms of injury or life.

Click for ISO 45001 Internal Auditor & Implementation Course


HAZID is hazard Identification. HAZID study is the systematic method of identifying hazards with the goal of preventing and/or reducing any adverse impact that it could lead to, either in terms of injury to personnel, damage or loss of property, environment and production. It can be used to determine the adverse effects of exposure to hazards and to plan necessary actions to mitigate such risks. It is generally a risk analysis tool developed to alert management to threats and hazards as early as possible during process operations. The classification is made on the basis of probability and consequences. The study provides a qualitative analysis of a work environment in order to determine its worker safety risk level.

Click for ISO 45001 Internal Auditor & Implementation Course

About the Author

Adebayo is a thought leader in continuous process improvement and manufacturing excellence. He is a Certified Six Sigma Master Black Belt (CSSMBB) Professional and Management Systems Lead Auditor (ISO 9001, 45001, ISO 22000/FSSC 22000 etc.) with strong experience leading various continuous improvement initiative in top manufacturing organizations. 

You can reach him here.

* The email will not be published on the website.