OCRA (Occupational Repetitive Action).
The factors taken into account in the assessment are:
- Repetitiveness: The risk increases insofar as the frequency of motion increases and/or the cycle time decreases.
- Force: Gentle forces should be applied, avoiding sudden or rough motions.
- Posture and movement: The work posture should be varied during the day. Extreme joint movement ranges and static postures maintained for a long time should be avoided.
- Duration of the work and insufficient recovery: Insufficient time for the body to recover between repetitive motions (for example, lack of recovery time) increases the risk of musculoskeletal disorders.
This method works by identifying Technical Actions (they entail musculoskeletal activity of the upper limbs). These are complex motions that involve one or several joints to be able to carry out a complete task.