Hazard List

Definition

Hazard List

the safety work product that lists the relevant credible hazards of an endeavor

Classification

As illustrated in the preceding figure, Hazard List is part of the following inheritance hierarchy:

• Type: Concrete
• Superclass: Document
• Subclasses:
  • None

Responsibilities

The typical responsibilities of a Hazard List are to:

• List the relevant hazards of an endeavor or system.
• Support hazard and safety risk analysis.
• Promote communication about these hazards among their stakeholders.
• Fulfill safety policy (e.g., mandatory reporting)

Contents

The typical contents of the hazard list are:

• Accident severity category
• Associated range of negative impact (harm)

Stakeholders

The typical stakeholders of the hazard list are:

• Producer:
  • Safety Team
• Evaluators:
  • Safety Evaluation Team
• Approvers:
  • Project Management Team
  • Customer Representative
• Maintainers:
  • Safety Team
• Users:
  • Safety Team

Phases

• Business Strategy: Completed
• Business Optimization: Completed
• Initiation: Completed
• Construction: Maintained
• Delivery: Maintained
• Usage: Maintained
• Retirement: Archived

Preconditions

The hazard list typically can be started if the following preconditions hold:

• The initiation phase is started.
• The safety team is adequately staffed and trained in safety risk analysis.

Inputs

The hazard list typically has the following inputs:

• Work Products:
  • Safety Program Plan
• Stakeholders:
  • Customer Representatives
  • Safety Domain Experts

Guidelines

• Different systems have different hazards with different impacts and different probabilities.

Conventions

The hazard list is typically constrained by the following conventions:

• Content and Format Standard
• MS Word Template
• XML DTD
• Evaluation Checklist

Examples

Example hazard list:

• Hazards due to Defects:
  • Specification Defect
  • Architecture or Design Defect
  • Implementation Defect (Latent Defect):
    • Data Defect
    • Hardware Defect
    • Software Defect
    • Documentation Defect
  • Integration Defect
  • Configuration Defect
• Potentially Hazardous Components:
  • Hazardous substances including explosives, flammable substances (solid, liquid, or gaseous), toxic or corrosive chemicals, poisons, asphyxiants such as exhaust gasses, carcinogens or mutagens, and infectious agents
  • High temperature or cryogenic fluids
  • Hazardous construction materials (e.g., asbestos)
  • Lasers and other sources of intense light.
  • High-pressure systems
  • Sources of ionizing or non-ionizing radiation
  • Sources of vibration or intense sound
  • Sources of electric current
  • Machinery with hydraulic arms, rotational subsystems, hazardous surfaces, sharp edges or projections that could cause punctures or cuts
• Environmental Hazards:
  • External sources of shock or vibration
  • Extreme temperatures, pressures, or climatic conditions
  • External sources of noise
  • External sources of laser and other intense light
  • External sources of toxic chemicals (e.g., exhaust gases) or corrosive substances (e.g., sea water)
  • External sources of ionizing or non-ionizing radiation
  • External sources of vibration or intense sound
  • External sources of electric current
  • Electromagnetic interference
  • Insect, rodent, or mould damage
  • Foreign bodies or dust
  • Defects in support equipment (e.g., power supplies or cooling systems)
  • Natural disaster (e.g., earthquake, flood, fire, and storm)
• Operational Hazards:
  • Operator or user error (both under normal conditions as well as conditions of stress)
  • Inadequate instruction, training, or rehearsal
  • Improper equipment layout, ergonomics, or lighting
  • Inadequate life support
  • Inadequate egress or crash safety