What are two key factors that affect fitness for duty apart from substance use?

The two key factors that affect fitness for duty apart from substance use are stress and illness. Stress can significantly impact an individual's mental and emotional state, leading to decreased concentration, impaired decision-making, and an overall inability to perform job responsibilities effectively. High levels of stress may stem from various sources, including work-related pressures or personal life issues, and can ultimately affect an employee's performance and safety on the job.

Similarly, illness, whether physical or mental, can hinder an individual's capability to fulfill their work duties. Physical ailments can lead to fatigue and decreased functionality, while mental health issues such as depression or anxiety can further complicate an individual’s ability to focus, communicate, and interact positively with colleagues. Recognizing these factors is crucial for maintaining an effective and safe work environment, making stress and illness pivotal considerations in assessing fitness for duty.