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Jaqin, Choesnul and Kurnia, Hibarkah and Purba, Humiras Hardi and Molle, Tosan Danumaya and Aisyah, Siti (2023) Lean Concept to Reduce Waste of Process Time in the Plastic Injection Industry in Indonesia. Nigerian Journal of Technological Development.
Aisyah, Siti and Purba, Humiras Hardi and Tampubolon, Salmon and Jaqin, Choesnul and Suhendar, Agus and Adyatna, Hendra (2023) Peningkatan Kemampuan Proses Menggunakan Metode Six Sigma: Studi Kasus di Industri Pertambangan Batubara. Jurnal INTECH Teknik Industri Universitas Serang Raya.
Purba, Humiras Hardi and Aisyah, Siti (2017) Quality Improvement & Lean Six Sigma. Expert.
Aisyah, Siti and Purba, Humiras Hardi (2017) Quality Improvement and Lean Six Sigma. Expert.
Universitas Mercu Buana (2017) Quality Improvement and Lean Six Sigma. C00201704519.