Evaluasi Pengendalian Kualitas pada Botol HDPE 40 ML dengan Metode DMAIC di PT Natamas Plast

Abstract

Pengendalian kualitas in-process diperlukan untuk mencegah terjadinya defect selama proses produksi, khususnya pada sistem produksi make to order. Pada proses Decorating (Printing UV) botol HDPE 40 ml di PT Natamas Plast, masih ditemukan variasi defect yang muncul secara berulang dan memengaruhi kelancaran proses produksi. Penelitian ini bertujuan untuk mengevaluasi pengendalian kualitas in-process dan mengidentifikasi akar penyebab defect yang terjadi. Metode yang digunakan adalah DMAIC (Define, Measure, Analyze, Improve, Control) dengan analisis menggunakan diagram Pareto, metode 5 Why, dan metode 5W+1H. Hasil penelitian menunjukkan bahwa defect dipengaruhi oleh teknik kerja operator, kestabilan mesin, dan metode inspeksi in-process yang belum terstandarisasi. Berdasarkan hasil tersebut, disusun usulan perbaikan berupa penguatan pengendalian kualitas in-process untuk mencegah terulangnya defect.

In-process quality control is required to prevent defects during production, particularly in make-to-order manufacturing systems. In the UV printing process of HDPE 40 ml bottles at PT Natamas Plast, recurring defects were identified and affected production continuity. This study aims to evaluate in-process quality control and identify the root causes of defects. The DMAIC (Define, Measure, Analyze, Improve, Control) framework was applied, supported by Pareto diagrams, 5 Why method, and the 5W+1H method. The results indicate that defects are mainly influenced by operator work techniques, machine stability, and insufficient standardization of in-process inspection methods. Based on these findings, improvement proposals were developed to strengthen in-process quality control and prevent recurring defects.