Sura Guna, and Yani Iriani. 2025. “Analisis Keterlambatan Penerbitan Setifikat Hasil Uji Menggunakan Metode Lean Six Sigma (Studi Kasus: PT X)”. Journal of Industrial Science and Mechanical Engineering 1 (1):83-94. https://journal.widyatama.ac.id/index.php/jisme/article/view/3041.