Which item is a cause of quality variation attributed to human factors?

Which item is a cause of quality variation attributed to human factors?

• A. Health problems
• B. Fatigue due to overwork
• C. Requires high salary
• D. Resourceful at work

Answer: (B)

Quality variation caused by human factors happens when the way a person performs changes how the work turns out. Fatigue from overwork is a common example: when someone is tired, attention, memory, and decision‑making suffer, leading to mistakes or inconsistent execution of tasks. Those lapses create differences in how products or services turn out, more than if the person were rested and focused. The other options don’t fit as direct factors altering performance—being resourceful at work is a positive trait that helps maintain quality, and needing a high salary isn’t a direct factor changing how work is done. Health problems can affect performance too, but fatigue from overwork is the most direct, everyday human-factor driver of quality variation.