Which of the following best describes a violation under the HFACS model?

A violation under the Human Factors Analysis and Classification System (HFACS) model specifically refers to actions that diverge from established procedures or policies, leading to potential safety risks. When someone acts against established policies, it reflects a conscious or unconscious decision that disregards the accepted safety mechanisms in place. This form of violation highlights the importance of adhering to procedures designed to mitigate risks and enhance safety within the organization.

In this context, a strict adherence to procedures would not constitute a violation but rather appropriate behavior that aligns with the HFACS framework. Following verbal instructions, while possibly well-intentioned, relies on the reliability of the oral communication and may not always align with formal policies, but does not directly imply a violation unless those verbal instructions contradict established procedures. Completing a task ahead of schedule can indicate efficiency, but it does not intrinsically reflect compliance or a violation regarding established policies. Therefore, the best description of a violation within the HFACS model is clearly the choice that discusses acting against those established policies.