Waste Assessment Model for Hot Coil Spring Production Using Lean Approach
DOI:
https://doi.org/10.15282/ijame.22.1.2025.8.0925Keywords:
Lean manufacturing, Waste measurement, Waste assessment model, Automotive parts productionAbstract
This study develops and validates customized waste assessment methods for the hot coiling spring manufacturing process. This is due to the high demand for springs in the automotive industry and the potential for a significant impact on the overall supply chain of the component. This study uses a case study approach with quantitative methods to assess waste in a hot coiling production line. Data were collected through direct observation (Genba) and documentation, with key waste types identified using a wastage check sheet. Microsoft Excel and VBA macros were used for analysis, enabling the ranking and prioritization of waste based on cost, cycle time and production efficiency. The assessment method successfully identifies and ranks various types of waste in terms of cycle time and cost analysis. Notably, the bar loading process exhibited a significant inefficiency, with an actual cycle time exceeding 3 times higher than the ideal time of 3 seconds. Similarly, the heating process had a 30% deviation from its ideal cycle time, indicating room for optimization. The cost analysis identifies the pre-treatment stage as a major contributor to high expenses, with a high actual cost rate of RM4.29 per piece, which is over 13 times higher than the average actual cost rate of RM0.33 across other processes. The painting process incurs the highest reject cost, which is 102% higher than the average reject cost. Rework analysis highlights the Pre-Treatment stage with a rework cost of 41% above the overall average reject cost. The findings offer critical insights for prioritizing improvements to optimize operations, minimize delays, and reduce production costs, particularly by addressing inefficiencies in the Pre-Treatment process, painting process, and bar loading. Simplifying the method and developing an automated waste assessment can prioritize cost-saving areas, enabling faster decisions, less manual effort, and continuous improvement of the respective processes through lean implementation.
References
[1] S. S. Sharma and R. Khatri, “Introduction to lean waste and lean tools,” in Lean Manufacturing, no. 2, Karmen Pažek, Ed., BoD – Books on Demand, p. 29, 2021.
[2] E. Jarvenpaa and M. Lanz, “Lean manufacturing and sustainable development,” in Encyclopedia of the UN Sustainable Development Goals, Responsible Consumption and Production, Leal Filho, W., A. M. Azul, L. Brandli, P. G. özuyar, and T. Wall, Eds., Springer International Publishing, pp. 423–432, 2020.
[3] A. Anuar, N. Othman, D. M. Sadek, N. Hami and N. S. Mansor, “Exploring the challenges and the implementation of lean practices under lean transformation project in Malaysian small and medium enterprises,” Jurnal Pengurusan, vol. 67, pp. 1–13, 2023.
[4] L. L. Klein, M. S. Tonetto, L. V. Avila and R. Moreira, “Management of lean waste in a public higher education institution,” Journal of Cleaner Production, vol. 286, p. 125386, 2021.
[5] C. K. X. Lin, S. A. Helmi, M. Hisjam and A. Ali, “Implementation of lean manufacturing in an electronic assembly company,” AIP Conference Proceedings, vol. 2217, p. 030198, 2020.
[6] J. Allen, “Making lean manufacturing work for you,” Journal of Manufacturing Engineering, vol. 124, pp. 1–6, 2000.
[7] S. A. Putri, A. Witonohadi and A. D. Akbari, “Production process improvement design to eliminate waste in 428H chain products using lean manufacturing at PT ABC,” Jurnal Optimasi Sistem Industri, vol. 15, no. 2, p. 246, 2022.
[8] R. Z. Radin Umar, J. Y. Tiong, N. Ahmad and J. Dahalan, “Development of framework integrating ergonomics in Lean’s Muda, Muri, and Mura concepts,” Production Planning & Control, vol. 35, no. 12, pp. 1466–1474, 2024.
[9] E. N. Roslin, A. Shamsuddin and S. Z. M. Dawal, “Discovering barriers of lean manufacturing system implementation in Malaysian automotive industry,” Advanced Materials Research, vol. 845, pp. 687–691, 2013.
[10] D. Sharma, P. Kr. Singh and N. Kukreja, “Commercial vehicles laminated spring manufacturing unit productivity enhancement by rejection minimization,” IOP Conference Series: Materials Science and Engineering, vol. 1116, no. 1, p. 012100, 2021.
[11] D. Rahmanasari, W. Sutopo and M. Z. M. Yusop, “Implementation of lean manufacturing process to reduce waste: A case study,” IOP Conference Series: Materials Science and Engineering, vol. 1096, no. 1, pp. 11200–12006, 2021.
[12] A. Palange and P. Dhatrak, “Lean manufacturing a vital tool to enhance productivity in manufacturing,” Materials Today: Proceedings, vol. 46, pp. 729–736, 2021.
[13] J. Singh, S. K. Gandhi and H. Singh, “Assessment of implementation of lean manufacturing in manufacturing unit - a case study,” International Journal of Business Excellence, vol. 21, no. 2, p. 274, 2020.
[14] S. Buer, M. Semini, J. O. Strandhagen and F. Sgarbossa, “The complementary effect of lean manufacturing and digitalisation on operational performance,” International Journal of Production Research, vol. 59, no. 7, pp. 1976–1992, 2020.
[15] J. Deuse, U. Dombrowski, F. Nöhring, J. Mazarov and Y. Dix, “Systematic combination of lean management with digitalization to improve production systems on the example of Jidoka 4.0,” International Journal of Engineering Business Management, vol. 12, no. 3, pp. 1–9, 2020.
[16] B. Byrne, O. McDermott and J. T. Noonan, “Applying lean six sigma methodology to a pharmaceutical manufacturing facility: A case study,” Multidisciplinary Digital Publishing Institute: Processes, vol. 9, no. 3, p. 550, 2021.
[17] O. A. Azuan, O. A. Aziz and A. R. M. K. Irwan, “Lean manufacturing adoption in Malaysia: A systematic literature review,” International Journal of Supply Chain, Operation Management and Logistics, vol. 1, no. 1, pp. 1–35, 2020.
[18] A. A. Wahab, M. Muriati and S. Riza, “Lean production system definition from the perspective of Malaysian industry,” Asia-Pacific Journal of Information Technology and Multimedia, vol. 6, no. 1, pp. 1–11, 2017.
[19] H. Paramawardhani and K. Amar, “Waste identification in production process using lean manufacturing: A case study,” Journal of Industrial Engineering and Halal Industries, vol. 1, no. 1, pp. 39–46, 2020.
[20] T. Y. Choi, T. H. Netland, N. Sanders, M. S. Sodhi and S. M. Wagner, “Just‐in‐time for supply chains in turbulent times,” Production and Operations Management, vol. 32, no. 7, pp. 2331–2340, 2023.
[21] N. H. Bandi, A. N. Noor Kamar and C. J. Kie, “Investigating the impact of lean manufacturing practices on operational performance,” Journal of Modern Manufacturing Systems and Technology, vol. 6, no. 2, pp. 42–47, 2022.
[22] M. Kholil, J. Haekal, A. Suparno, M. Rizki and T. Widodo, “Integration of lean six sigma in reducing waste in the cutting disk process with the DMAIC, VSM, and VALSAT method approach in manufacturing companies,” International Journal of Engineering Research and Advanced Technology, vol. 7, no. 09, pp. 26–42, 2021.
[23] B. Suhardi, Maudiena Hermas Putri K.S., and W. A. Jauhari, “Implementation of value stream mapping to reduce waste in a textile products industry,” Cogent Engineering, vol. 7, no. 1, p.1842148, 2020.
[24] Muhammad and Yadrifil, “Implementation of lean manufacturing system to eliminate wastes on the production process of line assembling electronic car components with WRM and VSM method,” Proceedings of the International Conference on Industrial Engineering and Operations Management, 2017, pp. 1153–1169, 2017.
[25] R. S. B. Hasan and M. N. Osman Zahid, “Implementation of lean tools as waste assessment method in a coil spring manufacturing,” AIP Conference Proceedings, vol. 2828, p. 080004, 2023.
[26] S. Moradi and P. Sormunen, “Implementing lean construction: A literature study of barriers, enablers, and implications,” Multidisciplinary Digital Publishing Institute: Buildings, vol. 13, no. 2, p. 556, 2023.
[27] H. Reda and A. Dvivedi, “Application of value stream mapping (VSM) in low-level technology organizations: A case study,” International Journal of Productivity and Performance Management, vol. 71, no. 6, pp. 2393–2409, 2022.
[28] A. Deshkar, S. Kamle, J. Giri, and V. M. Korde, “Design and evaluation of a Lean Manufacturing framework using Value Stream Mapping (VSM) for a plastic bag manufacturing unit,” Materials Today: Proceedings, vol. 5, no. 2, pp. 7668–7677, 2018.
[29] R. S. Raman and Y. Basavaraj, “Quality improvement of capacitors through fishbone and Pareto techniques,” International Journal of Recent Technology and Engineering, vol. 2, p. 20, 2019.
[30] Y. M. Awaj, P. S. Ajit, and Y. A. Wassihun, “Quality improvement using statistical process control tools in glass bottles manufacturing company,” International Journal for Quality Research, vol. 7, no. 1, p. 107, 2013.
[31] V. Shivajee, R. Singh, and S. Rastogi, “Manufacturing conversion cost reduction using quality control tools and digitization of real-time data,” Journal of Cleaner Production, vol. 237, p. 11767, 2019.
[32] E. Doyle, D. McGovern, S. McCarthy, and M. Perez-Alaniz, “Compliance-innovation: A quality-based route to sustainability,” Journal of Cleaner Production, vol. 210, pp. 266–275, 2019.
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