Definition

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Hazard Log

(Alias: hazard record)

All you have to do is write one true sentence. Write the truest sentence that you know.                       - Ernest Hemingway

A hazard log is a record keeping tool applied to tracking all hazard analysis, risk assessment and risk reduction activities for the whole-of-life of a safety-related system. Important aspects of its disposition and use are:

  • It is the single source of record for all risk management activities. Where necessary it cross-references other documents to demonstrate how hazards have been resolved
  • It is the primary mechanism for providing objective evidence of the risk management process and assurance of the effective management of hazards and accidents
  • It is continuously updated throughout the project life cycle (including decommissioning and disposal)
  • It is first created as an outcome of the preliminary hazard analysis process
  • It is typically maintained by a Systems Assurance Manager throughout a projects's development and assessment phases
  • It is formally closed out at the completion of a contracted development and handed over to the system owner
  • It is preserved into a system's operation and maintenance phases to support functional safety management of maintenance and enhancement activities.

Note!

A hazard log is deemed to be closed out when the safety risks associated with all hazards identified have been reduced to a level that is acceptable to the system owner.

A Sample Hazard

Space Shuttle

Hazard Record Structure

The table provides a sample record structure for each hazard recorded in the hazard log. It also provides a sample hazard entry for a Space Shuttle hazard.

# Data Item Description
1 Equipment category System, subsystem, unit or component where the hazard exists.
Example:
Space Shuttle Thermal Protection System
2 Hazard description A brief summary of the hazard
Example:
Damaged thermal tiles.
3 Operational mode Identify the operational mode where the hazard occurs.
Example:
Shuttle launch
4 Hazard cause(s) Conditions and events that cause the hazard.
Example:
Insulating foam detaches from the propellant tank and strikes thermal tiles.
5 Hazard effects Potential adverse effects on the system, people, property and the environment as a result of the hazard causing an accident.
Example:
Ingress of hot gasses into the Space Shuttle hull during re-entry to the earth's atmosphere causes destruction of the Shuttle.
6 Risk level Given the presence of the hazard, the probability and severity of an accident (refer risk).
Example:
Probability: probable
Severity: catastrophic
7 Risk reduction measures Measures proposed to reduce risk. For example, possible safeguards, recommended action, design criteria, safety requirements.
Example:
Inspect Space Shuttle heat shield while docked at the Space Station prior to re-entry.
8 Risk reduction implementation authority The organization(s) or organizational group(s) responsible for implementing the risk reduction measures.
Example:
Mission Planning
9 Hazard responsibility The organization or organizational group responsible for ensuring that safeguards are provided for the hazard.
Example:
Mission Control
10 Verification of corrective action Specified methods for determining that the hazard has been effectively controlled or its outcome mitigated. For example, tests, demonstration, analysis, inspections.
Example:
Inspect mission plan for addition of heat shield inspection procedure.
11 Other proposed and necessary actions Example:
Investigate methods to prevent foam detaching from the propellant tank during Shuttle launch.
12 Risk reduction measures taken The measures actually taken to reduce risk.
Example:
Mission Plan passed inspection 12 June, 2011 (refer review report XYZ).
13 Residual risk The risk remaining after risk reduction measures have been taken.
Example:
None
14 Hazard resolution status Remarks on the status of the hazard resolution process.
For example: open | in progress | pending action by others | closed.
Note that a hazard is deemed closed when it has been verified that the recommended risk reduction measures have been implemented and are effective.
Example:
closed
Collaboration

Member Comments

13 Comments 

9 member ratings

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RE Definition: Hazard Log

The Cost of Hiring Remote QA Engineers

By JackeHarryson » Wed 01-Dec-2021, 20:35, My rating: ✭ ✭ ✭ ✩ ✩

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