N.N. Mansor, S.A. Mustafa, R. Ahmad, M.A.C. Doi, T.C. Sin, and M.S. Jusoh. “DMAIC Steps Application to Improve Ergonomics Problem: A Case Study in Coffee Manufacturing Industry”. Malaysian Journal of Ergonomics (MJEr), vol. 4, June 2024, pp. 83-108, doi:10.58915/mjer.v4.2022.742.