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Unformatted text preview: er they are also to suggest
possible remedial/mitigating measures. In the latter case there also needs to be agreement as
to the responsibility and mechanism for selecting preferred remedial/mitigating measures and
securing appropriate authorization for action to be taken.
A HAZOP study is a team effort, with each team member being chosen for a defined role. The
team should be as small as possible consistent with the relevant technical and operating skills
and experience being available. This will generally involve at least four persons and rarely
more than seven. The larger the team, the slower the process. Where a system has been
designed by a contractor, the HAZOP team should contain personnel from both the contractor
and the client.
Recommended roles for team members are as follows:
– – Recorder: documents proceedings of the meetings. Documents the hazards and problem
areas identified, recommendations made and any actions for follow-up. Assists the study
leader in planning and administrative duties. In some cases, the study leader may carry
out this role. – Designer: explains the design and its representation. Explains how a defined deviation can
occur and the corresponding system response. – User: explains the operational context within which the element under study will operate,
the operational consequences of a deviation and the extent to which deviations may be
hazardous. – Spets: provide expertise relevant to the system and the study. May be called upon for
limited participation with the role revolving amongst different individuals. – 16
61 Study leader: not closely associated with the design team and the project. Trained and
experienced in leading HAZOP studies. Responsible for communications between project
management and the HAZOP team. Plans the study. Agrees study team composition.
Ensures the study team is supplied with a design representation package. Suggests
guide words and guide word – element/characteristic interpretations to be used in the
study. Conducts the study. Ensures documentation of the results. Maintainer: maintenance staff representative (when required). © BSI 28 1002−80ISB ©
August 2001 BS IEC 61882:2001
6 1882 Ó I EC:2001 – 18 – The viewpoint of the designer and user are always required for the study. However depending
on the particular phase of the life cycle in which the study is carried out, the type of
spets most appropriate to the study may vary. Licensed Copy: Puan Ms. Norhayati, Petroliam Nasional Berhad 4397000, 01 October 2003, Uncontrolled Copy, (c) BSI All team members should have sufficient knowledge of the HAZOP technique to enable them
to participate effectively in the study, or suitable introduction should be provided.
6.4 Preparatory work 6.4.1 General The study leader is responsible for the following preparatory work:
a) obtaining the information;
b) converting the information into a suitable format;
c) planning the sequence of the meetings;
d) arranging the necessary meetings.
In addition, the study leader may arrange for a search to be made of databases, etc. to
identify incidents which have occurred with the same or similar technologies.
The study leader is responsible for ensuring that an adequate design representation is
available. If the design representation is flawed or incomplete, it should be corrected before
the study begins. In the planning stage of a study, the parts, elements and their
characteristics should be identified on the design representation by a person familiar with the
The study leader is responsible for the preparation of a study plan that should contain the
· o bjective and scope of the study; · a l ist of participating members; · t echnical details:
- a d esign representation divided into parts and elements with defined design intent and
for each element a list of components, materials and activities and their
characteristics; - a l ist of proposed guide words to be used, and the interpretation of guide word –
element/characteristic combinations as outlined in 6.4.3; · a l ist of appropriate references; · a dministrative arrangements, schedule of meetings, including their dates and times and
locations; · f orm of recording required (see annex A); · t emplates that may be used in the study. Adequate room facilities and visual and recording aids should be provided to facilitate efficient
conduct of the meetings.
The briefing package consisting of the study plan and necessary references should be sent to
the study team members in advance of the first meeting to allow them to familiarize
themselves with its content. A physical review of the system is desirable. © BSI ISB ©
1002−8028ISB © 2001 17
71 BS IEC 61882:2001
6 1882 Ó I EC:2001 – 19 – The success of the HAZOP study strongly depends on the alertness and concentration of the
team members and it is therefore important that the sessions are of limited duration and that
there are appropriate intervals between sessions. How these requirements are achieved is
ultimately the responsibility of the study leader. Licensed Copy: Puan Ms. Norhayati, Petroliam Nasional Berhad 4397000, 01 October 2003, Uncontrolled Copy, (c) BSI 6.4.2 Design description Typically a design description may consist of some of the following documentation which
should be clearly and uniquely identified, approved and dated:
a) for all systems:
· d esign requirements and descriptions, flow...
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