When should the ISO evaluate the need for an ASO?

The need for an Assistant Safety Officer (ASO) is primarily evaluated when the span of control is too large. This concept is tied to effective incident management; when one individual holds responsibilities for too many subordinates, communication and oversight can become challenging, potentially leading to safety risks.

The role of the Incident Safety Officer (ISO) is to ensure that safety protocols are being followed and that the safety of all personnel involved is maintained. If the span of control exceeds a manageable number, an ASO can be introduced to help distribute responsibilities, ensuring that safety oversight is maintained and that the ISO can effectively monitor all aspects of the incident response.

In contrast, the other options suggest situations that may not necessarily warrant the addition of an ASO. For example, if the span of control is small, the ISO can handle the safety responsibilities directly without needing assistance. Similarly, establishing evacuation procedures or managing a simple incident does not inherently require the presence of an ASO unless the circumstances dictate otherwise.