Which of these production criteria can report the occurrence of fatigue ?

• A. Increase of accidents
• B. Increase of absences from work
• C. Reduction of labour activity
• D. All of the above

Answer: (D)

Fatigue affects how safely and effectively people work, so it tends to show up in several production metrics. When workers are fatigued, attention and reaction times drop, increasing the chance of accidents and near-misses, because mistakes become more likely as vigilance wanes. Fatigue can also show up in attendance patterns—people may take more sick leave or be absent more often due to ongoing tiredness or sleep-related health issues. At the same time, fatigued workers often show reduced effort and slower work pace, leading to lower overall labour activity and productivity. Because fatigue can influence safety outcomes, attendance, and output, each of these production criteria can indicate its occurrence. All of the above.