PURPOSE OF THE HAZID STUDY
  The overall purpose of Hazard Identification (HAZID) is to focus the attention of the Project Team on:
a. The impact of the facilities on their surroundings;
b. The impact of the surroundings on the facilities;
c. The interferences between main items;
d. The general hazards.

 A HAZID is brainstorming exercise, guided by a typical checklist  of this document and taking benefit from the previous experience of the persons around the table.

 While a HAZOP study is based on the examination of the response of the process to abnormal process parameter deviations, the HAZID study considers mainly the non-process hazards and the hazards associated with unwanted process releases.

 The HAZOP examines what might happen inside the process, whilst the HAZID examines what might happen outside the process.
 In a HAZOP, the cause of a potentially hazardous event in the process is Itemized and its effect recorded.
 In a HAZID, the effect or possible consequences of an incident are itemized and the possible causes are established and recorded.

 The HAZID must address the whole life cycle of the installations, from construction to abandonment. It must address as well the Simultaneous Operations (SIMOPS).
 A HAZID does not preclude the need for further hazard assessment; instead, it is a precursor to subsequent hazard analyses, and risk assessments, and is normally carried out during the earliest project phases.
 A HAZID is not an audit; Project Team members are invited and welcome to Participate in the brainstorming exercise.