This study presents an integrated ergonomic intervention designed to improve labor productivity in a melamine furniture workshop. Critical workstations, including cutting, drilling, and assembly, were identified based on postural risk and physical workload. To assess the workers' musculoskeletal condition, the Nordic Musculoskeletal Questionnaire (NMQ) was used, while postural risk levels were determined using the Rapid Entire Body Assessment (REBA) method. Additionally, biomechanical analysis and workstation redesign were supported through simulations with the 3D Static Strength Prediction Program (3DSSPP). Based on the ergonomic diagnosis, improvement proposals were developed, including the implementation of height-adjustable worktables, the use of lighter tools, and optimizing workspace layout to reduce awkward postures and excessive physical loads. The effectiveness of the intervention was evaluated by comparing productivity and biomechanical indicators before and after implementation. The results showed significant improvements after the ergonomic intervention. Monthly furniture production increased by 25% (from 160 to 200 units per month), while labor productivity per man-hour improved by 14%. In addition, assembly time per unit decreased by 8.5 minutes, postural risk levels were reduced, and spinal compression forces decreased from 3,350 N to 2,300 N. These findings demonstrate that affordable ergonomic improvements, supported by simulation tools, can effectively enhance both productivity and occupational health in small and medium-sized industrial workshops.

Keywords

Ergonomics, Labor productivity, REBA, Nordic Musculoskeletal Questionnaire and 3DSSPP.