Which of the following is NOT a factor in TEM?

Choosing aircraft fuel efficiency as the factor that is NOT part of Threat and Error Management (TEM) is correct. TEM focuses on understanding and managing human performance factors, crew resource management, and environmental conditions that affect safety and decision-making during flight operations.

Human performance is crucial in TEM as it involves training pilots to recognize and address threats and errors proactively. Crew resource management emphasizes teamwork and communication within the cockpit, ensuring that crew members work together effectively to manage tasks and mitigate risks. Environmental conditions, such as weather and operational environments, also play a significant role as they can introduce threats and complicate the decision-making process.

In contrast, while aircraft fuel efficiency is important for operational and financial reasons, it does not directly relate to the human factors and risk management focus of TEM. This principle is primarily concerned with the human aspects of aviation safety rather than the mechanical or efficiency-based metrics of the aircraft itself.