Kurnia, H., Wiyatno, T. N., Nugroho, B. H., & Nuryono, A. (2025). Sigma level choice examination in executing incline Lean Six Sigma (LSS) within the material and item material industry. Operations Excellence: Journal of Applied Industrial Engineering, 17(1), 90–104. https://doi.org/10.22441/oe.2025.v17.i1.134