Quality Control Using Six Sigma Methods and Multivariate Exponentially Weighted Moving Average (MEWMA) on EQ Spacing Products at PT Sinar Semesta
Abstract
In the production process of EQ Spacing products at PT Sinar Semesta, it was discovered that there were eight types of defects which resulted in product defects exceeding company standards. The aim of this research is to carry out a series of analyzes and actions focused on controlling product quality and identifying various aspects that require improvement during the production process. The types of defects with the highest percentage include uneven surfaces at 35.3%, porous at 24.9%, and chipped at 19.3%. Using the Multivariate Exponentially Weighted Moving Average (MEWMA) approach with a weight of 4.05, shifts were found in periods 6, 10, 11, 12, 13, 14, and 15 of the MEWMA graph, with a DPMO value of 24268 and a sigma of 3.5. This analysis demonstrates that in order to prevent excessive defects, production process performance must be improved. PT Sinar Semesta must suggest modifications based on the 5W+1H approach in order to lower the quantity of flaws in bag products. The goal of this quality improvement is to get closer to zero defects and a very low failure rate. It is intended that by doing this, the final product will be superior and satisfy the company's quality requirements.
References
Anuradha, G., Santhinigopalakrishnan, S. dan Sumathy, S. (2021) “Evaluation of Quality Control Data of Clinical Chemistry Parameters using Six Sigma Metrics Tool in Clinical Laboratory,” Journal of Pharmaceutical Research International, hal. 305–309. doi: 10.9734/jpri/2021/v33i55A33837.
Arinda, A., Mustafid, M. dan Mukid, M. A. (2016) “Penerapan Diagram Kontrol Multivariate Exponentially Weighted Moving Average (Mewma) Pada Pengendalian Karakteristik Kualitas Air (Studi Kasus: Instalasi Pengolahan Air III PDAM Tirta Moedal Kota Semarang),” Jurnal Gaussian, 5(1), hal. 31–40. doi: 10.14710/j.gauss.5.1.31-40.
Austin, D., Lauro, M. D. dan Herwindiati, D. E. (2020) “Perancangan Bagan Kendali Multivariate Dengan Metode T 2 Hotelling Untuk IPK dan Lama Studi Mahasiswa TI Universitas,” Jurnal Komputer dan Informatika, 15(1), hal. 317-325.
Carbone, F. et al. (2020) “Competitiveness and competitive advantages of chestnut timber laminated products,” Annals of Forest Science, 77(2), hal. 51. doi: 10.1007/s13595-020-00950-4.
Fatikha, C., Rahayu, M. dan Sumiati, S. (2021) “Effect Of Entrepreneurship Orientation And Market Orientation On Marketing Performance Through Competitive Advantage,” Jurnal Aplikasi Manajemen, 19(2), hal. 448–458. doi: 10.21776/ub.jam.2021.019.02.20.
Joes, S., Salomon, L. L. dan Daywin, F. J. (2023) “Penerapan Lean Six Sigma Untuk Meningkatkan Efisiensi dan Kualitas Produk Kemasan Food Pail Pada Perusahaan Percetakan,” Jurnal Ilmiah Teknik Industri, 10(3), hal. 224–236. doi: 10.24912/jitiuntar.v10i3.21188.
Mia, M. R. (2023) “Market competition, capital regulation and cost of financial intermediation: an empirical study on the banking sector of Bangladesh,” Asian Journal of Economics and Banking, 7(2), hal. 251–276. doi: 10.1108/AJEB-03-2022-0028.
Prihandono, D., Pandu Wijaya, A. dan Afiffah Ainii, A. (2021) “The Role Of Competitive Advantage To Enhance Marketing Performance: A Study On Indonesian MSME Business Community,” Jurnal Bisnis dan Manajemen, 22(2), hal. 147–161. doi: 10.24198/jbm.v22i2.882.
Purnomo, A. (2020) “Perbaikan Proses Kerja Menggunakan Metode Six Sigma Pada Bagian Pemasaran Kantor Pos Bandung,” Jurnal Logistik Bisnis, 10(02), hal. 46–51. doi: 10.46369/logistik.v10i02.1123.
Putri, A. S. dan Primananda, F. (2021) “Quality Control on Minimizing Defect Product on 20 OE Yarn,” Jurnal Ilmiah Teknik Industri, 20(1), hal. 81–88. doi: 10.23917/jiti.v20i1.12443.
Rahmadi, I. dan Bernik, M. (2018) “Penerapan Lean Six Sigma Pada UKM Untuk Meningkatkan Kualitas Produk Pendukung Perangkat Telekomunikasi,” ISEI Business and Management Review, II(1), hal. 9–24.
Shin, I. dan Park, S. (2019) “The relation between product market competition and corporate tax avoidance: evidence from Korea,” Investment Management and Financial Innovations, 16(2), hal. 313–325. doi: 10.21511/imfi.16(2).2019.26.
Siddique, A., Vlassopoulos, M. dan Zenou, Y. (2020) “Market Competition and Discrimination,” SSRN Electronic Journal. doi: 10.2139/ssrn.3586133.
Suhartini, Basjir, M. dan Hariyono, A. T. (2020) “Pengendalian Kualitas dengan Pendekatan Six Sigma dan New Seventools sebagai Upaya Perbaikan Produk,” Journal of Research and Technology, 6(2), hal. 297–311. doi: 10.55732/jrt.v6i2.373.
Suherman, U. D. (2021) “Effect of Relationship Marketing and Competitive Advantage on Marketing Performance (Survey on Cellphone Customers in Bandung),” Jurnal Manajemen Indonesia, 21(2), hal. 191. doi: 10.25124/jmi.v21i2.2293.
Wahyani, W., Chobir, A. dan Rahmanto, D. D. (2013) “Penerapan Metode Six Sigma Dengan Konsep Dmaic Sebagai Alat Pengendali Kualitas,” Institut Teknologi Adhi Tama Surabaya (ITATS). Tersedia pada: https://jurnal.itats.ac.id/wp-content/uploads/2013/06/PENERAPAN-METODE-SIX-SIGMA-DENGAN-KONSEP-DMAIC-SEBAGAI-ALAT-PENGENDALI-KUALITAS1.pdf.
Wibisono, Y. Y. dan Suteja, T. (2013) “Implementasi Metode DMAIC-Six Sigma dalam Perbaikan Mutu di Industri Kecil Menengah: Studi Kasus Perbaikan Mutu Produk Spring Adjuster di PT. X,” in Seminar Nasional IENACO, hal. 1–8. Tersedia pada: http://hdl.handle.net/11617/3559.
Wulansari, I. T. dan Karnaningroem, N. (2019) “Study of the Application of the RCA and Six Sigma Method for Quality of the Kalimas River in Surabaya (Prestasi Park-Petekan Bridge Segment),” IPTEK Journal of Proceedings Series, (5), hal. 161. doi: 10.12962/j23546026.y2019i5.6295.
Yunindah, I. et al. (2016) “Analisis Strategi Bersaing pada PT Citra Surya Pacific,” Agora, 4(2), hal. 188–196.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
