MENURUNKAN JUMLAH DEFECT CANVAS PADA PRODUK TREATMENT DENGAN MENGGUNAKAN METODE DMAIC PADA PT. GTI TBK

ARIEF, AHMAD MIFTAHUL (2021) MENURUNKAN JUMLAH DEFECT CANVAS PADA PRODUK TREATMENT DENGAN MENGGUNAKAN METODE DMAIC PADA PT. GTI TBK. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

PT GTI Tbk is a motorcycle tire manufacturer based in Indonesia, The production process cannot be separated from the potential for abnormal processes that can cause defects in the product, especially in the production process of making tire constituent materials. One of the divisions that produces the highest defect canvas is Topping Calender with the product that is produced is Treatment. The average defect canvas treatment for the January-March 2020 period is 1.02%, while the target set by the company is 0.95%. The research aims to determine the highest type of defect treatment, to find the root of the problem from the highest type of defect Treatment and to improve the main cause of the appearance of the highest defect in Treatment products. The method used is DMAIC (Define, Measure, Analyze, Improve, Control). The results of the calculation of the analysis carried out obtained the highest type of defect treatment, namely folding treatment with a percentage of 81%. The main causes of folding treatment include: Initial treatment linner cloth roll is not long enough, the operator puts the treatment on the linner alone, The use of tension treatment is not stable, the pressure brake let off setting is still manual (by feeling operator) and the tension linner in the wind up process. Topping Calender is too small. Implementation of improvements made is to increase the length of the linner, Change the motor tension and torque settings, Modify the pressure brake from manual to automatic, Increase the value of the pressure brake linner. Treatment and laying the Treatment on the linner are done by 2 people. The results obtained after the improvement were that the sigma value increased from 3.67 to 4.0. Keywords: DMAIC, Six Sigma, Defect, Treatment PT GTI Tbk merupakan produsen ban sepeda motor yang berada di indonesia, dalam proses produksi tidak terlepas dari adanya potensi abnormal proses yang dapat menyebabkan timbulnya cacat pada produk, khususnya pada proses produksi pembuatan material penyusun ban. Salah satu divisi yang menghasilkan defect material canvas tertinggi adalah Topping Calender dengan produk yang dihasilkan adalah Treatment. Rata-rata defect canvas Treatment priode Januari-Maret 2020 sebesar 1,02% sedangkan target yang ditetapkan perusahaan 0,95%. Penelitian ini bertujuan untuk mengetahui jenis defect Treatment tertinggi, mencari akar masalah dari jenis defect Treatment tertinggi dan implementasi perbaikan terhadap penyebab utama munculnya defect tertinggi pada produk Treatment. Metode yang digunakan yaitu DMAIC (Define, Measure, Analyze, Improve, Control). Hasil perhitungan analisis yang dilakukan diperoleh jenis defect Treatment tertinggi yaitu Treatment Melipat dengan persentase sebesar 81%. Penyebab utama Treatment Melipat diantaranya: Awal gulungan kain linner Treatment kurang panjang, operator meletakan Treatment pada kain linner sendirian, Penggunaan tension Treatment tidak stabil, settingan pressure brake let off masih manual (by feeling operator) dan tension linner pada proses wind up Topping Calender terlalu kecil. Implementasi perbaikan yang dilakukan yaitu menambah panjang kain linner, Mengubah settingan tension dan torsi motor, Modifikasi pressure brake dari manual menjadi automatis, Menambah nilai pressure brake linner Treatment dan peletakan Treatment pada linner dilakukan 2 orang. Hasil yang diperoleh setelah dilakukan pebaikan yaitu nilai sigma meningkat dari 3,67 menjadi 4,0. Kata kunci : DMAIC, Six Sigma, Defect, Treatment

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