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ECERI: A context-aware extension of REBA for elevated construction ergonomic risk
1School of Civil & Environmental Engineering, and Construction Management, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
Introduction:
Musculoskeletal disorders (MSDs) are prevalent in construction, particularly during elevated tasks where environmental context critically influences risk, yet conventional ergonomic tools like the Rapid Entire Body Assessment (REBA) often overlook these factors.
Method:
This study introduces and rigorously validates the Elevated Construction Ergonomic Risk Index (ECERI), a context-aware extension of REBA designed specifically for height-exposed work. ECERI integrates four key contextual amplifiers: working height, surface condition, slope angle, and edge proximity, using a theoretically grounded, multiplicative weighting scheme incorporating synergistic interaction effects. Grounded in the Contextual Ergonomic Risk Amplification (C-ERA) framework, ECERI was assessed using a comprehensive multi-tier validation strategy. Theoretical proofs confirmed mathematical consistency, while simulations showed ECERI reclassified 25.1% of scenarios into higher-risk categories.
Results:
Empirical pilot validation against expert judgments revealed ECERI's significantly improved alignment (R2 = 0.852 vs. REBA's 0.737, p < 0.001) and high-risk sensitivity (0.923 vs. 0.615) without sacrificing specificity (0.917). Key interactions, notably Height-Slope, were confirmed as significant risk drivers.
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