Lias, S. et al. 2026. Designing Ergonomic Work Aids to Improve Worker Productivity in Spring Mattress Manufacturing at PT Rentang Buana Niagamakmur. Jurnal Improsci. 3, 4 (Feb. 2026), 408–426. DOI:https://doi.org/10.62885/improsci.v3i4.1085.