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All Journal Jurnal Sistem dan Manajemen Industri Indonesian Journal of Industrial Engineering & Management
Tubagus Hendri Febriana
Mercubuana University
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Transportation

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Problem-solving step analysis for increasing tire static balance levels: a case study Tubagus Hendri Febriana; Hendi Herlambang; Hernadewita Hernadewita; Hasbullah Hasbullah; Abdul Halim
Jurnal Sistem dan Manajemen Industri Vol. 5 No. 1 (2021)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (957.852 KB) | DOI: 10.30656/jsmi.v5i1.3292

Abstract

One of the company's efforts in implementing the commitment to customer satisfaction is carried out through continuous improvement activities. All indicators are evaluated to determine the level of quality stability against process variations that will impact non-compliance with predetermined product specifications. One of the quality problems found in the tire manufacture industry is the out-percentage of tire uniformity, which suddenly increases, one of which is the value of static balance. This study analyses the process variation factors that occur to take corrective and preventive actions through a series of Root Cause Analysis (RCA), Fault Tree Analysis (FTA), and Failure Mode and Effect Analysis (FMEA). Refers to the analysis result, it was found that there was a problem with the rubber film gauge variation at the manufacturing step of the steel breaker, one of the material components in the tire construction. Two main factors cause rubber film thickness variation: rubber sticky with roll calendar, Radial Run Out (RRO) Roll Calendar out standard, and viscosity compound variation with 12 root problems found. The results of the improvements that have been made can effectively improve rubber film thickness variation, increase the Cpk level of steel breaker material from 0.82 to 1.91 and reduce the out percentage ratio of static balance by 54.65%.
Perbaikan Ketahanan Lifetime Bladder untuk Peningkatan Curing Efficiency pada Proses Industri Tire Manufacture Tubagus Hendri Febriana; Herna Dewita; Cecep Hermawan; Hendi Herlambang
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 1, No 1: February 2020
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v1i1.9258

Abstract

The efficiency of the curing process is one of the critical points in the tire manufacturing industry. One of the factors that need to be considered in curing efficiency is the low age of the bladder as an auxiliary material used for heat / thermal transfer from the curing machine to green tires during the curing process. Low bladder life will directly impact the high frequency of bladder changes, leading to lost time in the preparation and assembly of the curing machine at the processing stage. In this condition, when studied, the average life span of the bladder in 2017 was 237 times used, while the company's target in 2018 for the bladder life target was set at 450 times to support the curing process efficiency project. This study aims to analyze the potential problems that cause a low shelf life. This research uses the concept of DMAIC (Define-Measure-Analyse-Improve-Control) and Failure Mode and Effect Analysis (FMEA) to determine the main causal factors and preventive actions and to determine priority improvements based on the Risk Priority Number (RPN). The improvement results showed that bladder life could increase from 237 times to 450 times as targeted, loss of bladder change during curing could reduce 0.79%, and index bladder consumption could be reduced by 36.7% total cost savings of USD 196,576 per year.
Co-Authors Abdul Halim Cecep Hermawan Hasbullah Hasbullah Hendi Herlambang Hendi Herlambang Herna Dewita Hernadewita, Hernadewita