What is a main concern when discussing energy source controls during a job briefing?

In the context of a job briefing, focusing on worker exposure to energized parts is crucial because it directly relates to safety precautions. When linemen work with energy sources, especially in high-voltage scenarios, there is a significant risk of electrical shock or arc flash, which can result in severe injuries or fatalities. Ensuring that everyone involved understands proper safety protocols, such as lockout/tagout procedures, helps mitigate these risks, thereby prioritizing the well-being of the workers.

Although operational costs, environmental impact, and duration of power outages are important factors in energy source management, they do not directly impact the immediate safety of the workers on-site. A job briefing primarily aims to identify hazards and establish safety measures, making worker exposure the most critical concern to address.