What is the difference between WERA and REBA/RULA?

WERA was designed specifically for manufacturing environments and assesses more body regions (9) plus workplace factors (5). REBA and RULA focus on upper body posture. WERA provides a more comprehensive factory floor assessment.

Can WERA assessments be done from video?

Yes. Yamazo Studio allows you to perform WERA assessments directly from recorded production video, eliminating the need to observe operators in real-time and reducing disruption to production.

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Glossary

WERA Ergonomic Risk Assessment | Workplace Ergonomics Guide

WERA (Workplace Ergonomic Risk Assessment) is a structured method for evaluating physical ergonomic risks in manufacturing workplaces. It assesses 9 body regions (shoulder, wrist, back, neck, leg, etc.) plus 5 additional factors (force, vibration, contact stress, task duration, work pace) to produce a risk score that guides intervention priorities.

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How to Create

In Yamazo Studio, WERA assessments are conducted directly from production video. Select a work cycle, observe the operator's posture for each body region, and score each factor. The software calculates the overall WERA risk level and highlights body regions that exceed acceptable thresholds. Export the assessment as PDF for documentation.

Example

An electronics assembly plant used Yamazo Studio's WERA module to assess 12 workstations. Three stations scored 'High Risk' for wrist and shoulder — repetitive micro-assembly tasks with poor tool positioning. After workstation redesign, follow-up WERA assessments showed all stations within acceptable risk levels.