Glossary · Hazards and harm
Psychosocial stressor
In occupational safety, a psychosocial stressor is an organizational or social factor, such as time pressure, shift work, unclear roles or isolation, that can contribute to stress, fatigue, distraction or unsafe performance.
- Machine safety
- Human factors
In one sentence
A psychosocial stressor such as time pressure or shift work shapes how safely people operate machines, even when the machine itself is well designed.
Example
On a packaging line with a tight output target, operators skip the pre-use check to make up for downtime; the stressor is the target, not a lack of knowledge.
How it applies
- Machine safety: Psychosocial stressors are mostly outside the machine designer's control, but they shape how the machine is used. Machine pace, frequent interruptions and confusing alarms can add to them, and design can avoid these.
- Human factors: Stress, fatigue and distraction make human error and bypass behavior more likely. Production pressure is a common driver of guard defeat.
- Organization: ISO 45001 lists social factors, such as workload and working hours, among the aspects to consider in hazard identification. Employers address them through staffing, shift design and safety culture.
- Technical documentation: Procedures that are unrealistic under real time constraints will not be followed. Check documented task times against actual operation.
Psychosocial stressor vs. ergonomic hazard
An ergonomic hazard lies in the design of the task and workplace. A psychosocial stressor lies in the organization and social context.