Which of the following is a requirement when evaluating support systems?

When evaluating support systems, one critical requirement is assurance from a competent person. This assurance ensures that the systems in place are not only designed correctly but are also installed and maintained according to established safety standards and regulations. A competent person is defined as someone who is knowledgeable and experienced in the specific field, allowing them to recognize hazards and take the appropriate measures to mitigate risks.

Having assurance from a competent person is essential because it provides an authoritative evaluation of the support systems, ensuring they can safely sustain the loads they are meant to support. This practice is vital in the excavation field, where the stability of equipment, structures, and work environments is crucial to the safety of all personnel involved.

In contrast, the other options do not provide the same level of assurance or safety. For example, written documentation is important in many contexts, especially in legal or compliance matters, as it provides a clear record of evaluations and decisions made regarding safety practices. Relying on consultation with untrained personnel is inherently risky, as it does not contribute effective knowledge or expertise. Additionally, a verbal agreement among workers lacks the formal and verifiable accountability that written documentation or a competent person's assurance provides. Each of these elements highlights the importance of verified and structured evaluations in maintaining safety and compliance in