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Very Fernando
Indra Setiawan
Yulizan Rizki
Humiras Hardi Purba
Fahriza Nurul Azizah
Isdaryanto Iskandar

The competition in the automotive industry is increasingly challenging, where the company's task of ensuring customers are satisfied with the products we produce is the main factor in winning them. That is the value of the manufacturing industry to continuously improve quality. This study aims to reduce the reject rate and determine the priority of problems in the fuel tank production process. This study uses the six sigma method based on a simple problem-solving methodology consisting of Define, Measure, Analyze, Improve and Control. This method combines various statistical tools and other process improvement approaches. The results of this study show that the company's Sigma level in February carried out in the welding & press section obtained a sigma value of 4.0 and process capability of 1.34. This means that the quality control process that has been carried out has not been going well because the product is defective and still needs to be improved. Finally, this paper provides some recommendations for improving process capability.


Keywords: DMAIC Index Capability Fuel Tank Manufacturing Industry Quality
Ahmadi, M., Sharafi, P., Mousavi, M. H., & Veysi, F. (2021). Power quality improvement in microgrids using statcom under unbalanced voltage conditions. International Journal of Engineering Transactions C: Aspects, 34(6), 1455–1467. https://doi.org/10.5829/ije.2021.34.06c.09
Alshammari, A., Redha, S., Hussain, S., Nazzal, T., Kamal, Z., & Smew, W. (2018). Quality improvement in plastic injection molding industry: Applying Lean Six Sigma to SME in Kuwait. Proceedings of the International Conference on Industrial Engineering and Operations Management, 2018-March, 2856–2865.
Arif, A., & Abdul, W. (2019). Pengendalian Kualitas Produk Galon Air Mineral 19 L Dengan Pendekatan Six Sigma. Journal Knowledge Industrial Engineering, 6(1), 81–90.
Costa, J. P., Lopes, I. S., & Brito, J. P. (2020). Six sigma application for quality improvement of the pin insertion process. 29th International Conference on Flexible Automation and Intelligent Manufacturing, 38(2019), 1592–1599. https://doi.org/10.1016/j.promfg.2020.01.126
Crosby, P. B. (1979). Quality is Free : The Art of Making Quality Certain (1th ed.). New American Library.
Feigenbaum, A. V. (1983). Total Quality Control (3rd ed.). McGraw-Hill,Inc.
Hendra, Setiawan, I., Hernadewita, & Hermiyetti. (2021). Evaluation of Product Quality Improvement Against Waste in the Electronic Musical Instrument Industry. Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika, 7(3), 402–411. https://doi.org/10.26555/jiteki.v7i3.21904
Hernadewita, H., Ismail, M., Nurdin, M., & Kusumah, L. (2019). Improvement of magazine production quality using Six Sigma method : case study of a PT.XYZ. Journal of Applied Research on Industrial Engineering, 6(1), 71–79. https://doi.org/10.22105/JARIE.2019.159327.1066
Kurnia, H., Jaqin, C., Purba, H. H., & Setiawan, I. (2021). Implementation of Six Sigma in the DMAIC Approach for Quality Improvement in the Knitting Socks Industry. Tekstil Ve Muhendis, 28(124), 269–278. https://doi.org/10.7216/1300759920212812403
Kurnia, H., & Purba, H. H. (2021). A Systematic Literature Review of Lean Six Sigma in Various Industries. Journal of Engineering and Management in Industrial System, 9(2), 19–30. https://doi.org/10.1088/1757-899X/1003/1/012096
Latifah, & Rosyidi, K. (2017). Pengendalian Kualitas Produksi Lakop Sapu Lantai Dengan Menggunakan Metode Six Sigma Di UD. XY Purwosari. Journal Knowledge Industrial Engineering, 5(1), 1–10.
Maryani, E., Purba, H. H., & Sunadi, S. (2020). Process Capability Improvement Through DMAIC Method for Aluminium Alloy Wheels Casting. Journal of Industrial Engineering & Management Research, 1(4), 19–26.
Pereiraa, M. T., Bentoa, M. I., L. P. Ferreiraa, Sá, J. C., Silvaa, F. J. G., & Baptista, A. (2019). Using Six Sigma to analyse Customer Satisfaction at the product design and development stage. 29th International Conference on Flexible Automation and Intelligent Manufacturing, 38(2019), 1608–1614. https://doi.org/10.1016/j.promfg.2020.01.124
Praharsi, Y., Jami’in, M. A., Suhardjito, G., & Wee, H. M. (2020). Six sigma implementation and analysis-An empirical study of a traditional boat building industry in Indonesia. Proceedings of the International Conference on Industrial Engineering and Operations Management, 0(March), 3092–3100.
Sachin, S., & Dileeplal, J. (2017). Six Sigma Methodology for Improving Manufacturing Process in a Foundry Industry. International Journal of Advanced Engineering Research and Science, 4(5), 131–136. https://doi.org/10.22161/ijaers.4.5.21
Sambrani, V. N. (2016). Process Capability–A Managers Tool for 6 Sigma Quality Advantage. Global Journal of Management and Business Research, 16(3), 1–9.
Saryanto, S., Purba, H. H., & Trimarjoko, A. (2020). Improve quality remanufacturing welding and machining process in indonesia using six sigma methods. Journal Europeen Des Systemes Automatises, 53(3), 377–384. https://doi.org/10.18280/jesa.530308
Setiawan, B., Rimawan, E., & Saroso, D. S. (2021). Quality Improvement Using The DMAIC Method To Reduce Defect Product In The PVC Compounds Industry. Natural Volatiles & Essentil Oils, 8(4), 5388–5405.
Setiawan, I., Purba, H. H., & Debora, F. (2020). A systematic literature review of implementation six sigma in manufacturing industries. Operations Excellence: Journal of Applied Industrial Engineering, 12(3), 319. https://doi.org/10.22441/oe.2020.v12.i3.005
Setiawan, I., & Setiawan. (2020). Defect reduction of roof panel part in the export delivery process using the DMAIC method: a case study. Jurnal Sistem Dan Manajemen Industri, 4(2), 108–116. https://doi.org/10.30656/jsmi.v4i2.2775
Soundararajan, K., & Reddy, K. J. (2020). Productivity and quality improvement through DMAIC in SME. International Journal of Productivity and Quality Management, 31(2), 271–294. https://doi.org/https://doi.org/10.1504/IJPQM.2020.110027

Sreedharan, V. R., Rajasekar, S., Kannan Santhosh, S., Arunprasad, P., & Trehan, R. (2018). Defect reduction in an electrical parts manufacturer: a case study. TQM Journal, 30(6), 650–678. https://doi.org/10.1108/TQM-03-2018-0031
Trimarjoko, A., Purba, H. H., & Nindiani, A. (2020). Consistency of dmaic phases implementation on six sigma method in manufacturing and service industry: A literature review. Management and Production Engineering Review, 11(4), 34–45. https://doi.org/10.24425/mper.2020.136118
Trimarjoko, A., Saroso, D. S., Purba, H. H., Hasibuan, S., Jaqin, C., & Aisyah, S. (2019). Integration of nominal group technique, Shainin system and DMAIC methods to reduce defective products: A case study of tire manufacturing industry in Indonesia. Management Science Letters, 9(Spceial Issue 13), 2421–2432. https://doi.org/10.5267/j.msl.2019.7.013
Utami, M. W. D., Ma’aram, A., & Hisjam, M. (2021). Six Sigma Implementation in Production Process in Electronic Company Malaysia. IOP Conference Series: Materials Science and Engineering, 1096(1), 012012. https://doi.org/10.1088/1757-899x/1096/1/012012
Vanany, I., Tan, K. H., Siswanto, N., & Indah, N. (2020). Halal six sigma framework for defects reduction framework. Journal of Islamic Marketing, 12(4), 776–793. https://doi.org/10.1108/JIMA-11-2019-0232