Which aspect is essential for Yard Marshals to verify before waves exit?

The essential aspect for Yard Marshals to verify before waves exit is the safety compliance of associates. Ensuring that safety protocols are adhered to is critical to maintaining a secure environment in the yard. Yard Marshals play a vital role in this process as they are responsible for overseeing the operations and ensuring that all associates follow safety regulations. This verification helps prevent accidents and injuries, which can have significant implications not only on the well-being of the workers but also on operational efficiency and liability for the organization.

While the number of vans in the queue and the weight of loaded packets are important factors in yard operations, they do not have the same immediate impact on safety as ensuring that associates comply with safety measures. Thus, safety compliance stands out as the priority aspect that Yard Marshals must focus on prior to the departure of waves. This focus on safety is essential in fostering a culture of responsibility and protection within the operational setting.