704 Hazard Analysis and Control

Phase Hazard Analysis

Phase hazard analysis is a helpful tool in construction and other industries that involve:

• a rapidly changing work environment,
• different contractors, and
• widely different operations.

A phase is defined as an operation involving a type of work that presents hazards not experienced in previous operations, or an operation where a new subcontractor or work crew is to perform work.

This type of hazard analysis is conducted before beginning each major phase of work. The contractor or site manager should assess the hazards in the new phase. He/she should not only coordinate appropriate supplies and support, but also prepare for hazards that can be expected and establish a plan to eliminate or control them.

To find these hazards and to eliminate or control them, you will use many of the same techniques that you use in routine hazard analysis, change analysis, process analysis, and job analysis. One major additional task will be to find those hazards that develop when combinations of activities occur in close proximity.

Workers for several contractors with differing expertise may be intermingled. They will need to learn how to protect themselves from the hazards associated with the work of nearby workers as well as the hazards connected to their own work and the hazards presented by combinations of the two kinds of work.

When Should the Project Phase Analysis Occur?

It is best to conduct a thorough pre-planning phase analysis that involves all contractors (if possible) in the process. The sooner you can anticipate and respond to potential hazards, the better. At the beginning of each phase, an additional phase analysis would also be appropriate to make sure all contingencies have been addressed.

Putting It All Together

Job hazard analysis, process hazard analysis, and phase analysis are all important tools you can use to make the workplace safe and healthful for workers. Remember, the analysis process begins with having industrial hygiene, safety, and occupational health experts conduct comprehensive assessments of your worksite to help you initially determine the existing and potential hazards.

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