What is HAZOP? :

HAZOP is a HAazard and OPerability study. This is a structured and systematic examination of a complex planned or existing process and operations, in order to identify and evaluate problems that may create risks to personnel or equipment. The intention of performing a HAZOP is to review the design and engineering or processes issues that may otherwise not have been found.

 

More simple description of HAZOP :

Hazard and Operability Study (HAZOP) is a systematic approach to investigating each element of a process to identify all of the ways and possibilities in which parameters can deviate from the intended design conditions and create hazards, failures, operability problems.

 

More about HAZOP Study, best practices and methodology (literature) :

HAZOP: Guide to Best Practice, Third Edition
by Frank Crawley and Brian Tyler

Hazop & Hazan: Identifying and Assessing Process Industry Hazards, Fouth Edition
by Trevor A. Kletz

Guidelines for Process Hazards Analysis (PHA, HAZOP), Hazards Identification, and Risk Analysis
by Nigel Hyatt

Urea Synthesis Hazard Analysis: PHA, HAZOP and Quantitative Risk Assessment
by Muhammad Imran Rashid and Naveed Ramzan

System Safety: HAZOP and Software HAZOP
by Felix Redmill and Morris Chudleigh

HAZOP: Guide to Best Practice, 2nd Edition - IChemE
by Brian Tyler and Frank Crawley

IEC 61882 Ed. 1.0 b:2001, Hazard and operability studies (HAZOP studies) - Application guide
by IEC TC/SC 56

HAZOP: Guide to Best Practice, Third Edition by Frank Crawley
by Frank Crawley; Brian Tyler

Hazard Analysis Techniques for System Safety
by Clifton A. Ericson II

IEC 61882:2016

HAZOP: Guide to Best Practice
by Brian J. Tyler, Frank Crawley, Malcolm L. Preston

 

The latest (end of 2016 y.) standards regarding HAZOP :

IEC 61882:2016:

provides a guide for HAZOP studies of systems using guide words. It gives guidance on application of the technique and on the HAZOP study procedure, including definition, preparation, examination sessions and resulting documentation and follow-up.