MISLAN, MISLAN (2020) ANALISIS PENGENDALIAN KUALITAS PRODUK BAJA TULANGAN BETON DENGAN METODE STATISTICAL QUALITY CONTROL (SQC) DAN FAILURE MODE AND EFFECT ANALYSIS (FMEA). S2 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Product quality is a characteristic of a product that is able to meet customer needs. Product quality is a top priority in maintaining customer confidence. Including the quality of steel bars products needs to be controlled properly because it is one of the strategic industries in Indonesia. The purpose of this study is to analyze the most dominant defects and look for factors that cause defects the Steel Deformed Bar. Determine the greatest risk of failure in the production process and find the right corrective and quality improvement proposals. The method used is Statistical Quality Control (SQC) and Failure Mode and Effect Analysis (FMEA) methods. The defect types of Steel Deformed Bar products include cross, and line. The main cause of cross defects is the top and bottom roll is not center, the corrective action is to add a roll check item with a spy plate in the roll shop technician's joblist. The main cause of Scratch defects is the vibrating cooling roll (Spindle Carrier vibrates), the corrective action by replacing the spindle carrier. The cause of the line defect is that the caliber pincroll is too small. Roll caliber is worn out, the corrective action is to replace the type of roll case iron with TC ring. The corrective action taken is effective as evidenced by the decreased percentage of defects. Keyword - Statistical Quality Control, Failure Mode and Effect Analysis, Steel Deformed Bar. Kualitas produk adalah karakteristik dari suatu produk yang mampu memenuhi kebutuhan pelanggan. Kualitas produk menjadi prioritas utama dalam menjaga kepercayaan pelanggan. Termasuk kualitas produk baja tulangan beton perlu dikendalikan dengan baik karena termasuk salah satu industri strategis di Indonesia. Tujuan penelitian ini adalah menganalisis defect yang paling dominan dan mencari faktor penyebab timbulnya defect pada produk baja tulangan beton sirip. Menentukan risiko kegagalan proses produksi terbesar dan menemukan usulan tindakan perbaikan dan peningkatan kualitas yang tepat. Metode yang digunakan adalah Statistical Quality Control (SQC) dan metode Failure Mode and Effect Analysis (FMEA). Jenis defect dominan produk baja tulangan beton sirip meliputi miring/ cross, cerna, dan bergaris. Penyebab utama defect adalah roll atas dan bawah tidak center tindakan perbaikannya menambahkan item pemeriksaan roll dengan spy plate dalam joblist teknisi roll shop. Penyebab utama defect cerna yaitu cooling roll bergetar (Spindle Carrier bergetar), tindakan perbaikannya dengan mengganti spindle carrier. Penyebab defect bergaris yaitu caliber pincroll terlalu kecil, tindakan perbaikannya merubah design pinchroll. Roll caliber aus, tindakan perbaikannya mengganti jenis roll case iron dengan TC ring. Tindakan perbaikan yang dilakukan efektif dibuktikan dengan persentase defect menurun. Keyword - Statistical Quality Control, Failure Mode and Effect Analysis, Baja Tulangan Beton.
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