Improving the Efficiency of the Car Seat Production Line Using the Toyota Production System
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Abstract
Improving the efficiency of the car seat production line using the Toyota Production System. The objective is to develop production processes that align with actual production volumes, standardize work procedures, and reduce waste in line with the ECRS principles. The improvements resulted in a reduction of two employees in total. In the pickup front-seat production line, the number of employees was reduced from 6 to 5, increasing work efficiency from 59.57% to 79.67%. In the rear-seat pickup production line, the number of employees was reduced from 3 to 2, improving efficiency from 58.43% to 98.47%. In the passenger car seat production line, the number of employees was reduced from 6 to 3 in line with Takt Time, resulting in a decrease in efficiency from 97.26% to 94.41%. Overall, these improvements enabled the factory to reduce production costs by 432,000 baht per year.
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References
K. Korbuakaew, P. Phoosomma, and C. Bunsan, “Implementing the Toyota Production System in the Manufacturing Process of Ready-Made Clothing A Case Study Jacket Production, VT Garment Co., Ltd.” The Journal of Industrial Technology: Suan Sunandha Rajabhat University, Vol. 11(2), 2023, pp. 95–108.
P. Larpsomboonchai, and N. Kecharananta, “Waste Reduction in Onion Packing Process by Using Toyota Production System (TPS): A Study at Thawornkarnkaset Packing Plant” Suthiparithat, Vol. 29(92), 2015, pp. 218–235.
J. Prommontree, and W. Suksanchananun, “Application of Six Sigma in Conjunction with Toyota Production System to Improve the Process of the Body and Paint Departments Toyota Songkhla Co., Ltd.” Suthiparithat, Vol. 29(92), 2015, pp. 182–199.
T. Prayatwong, C. Thurapaeng, T. Tonglim, and C. Pornsing, “Work Study and Standard Time for Processing Dragon Jars: Case Study of a Dragon Jar Factory,” Industrial Technology Lampang Rajabhat University Journal, Vol. 15(1), 2022, pp. 1-12.
H. Suraphan, and S. Swangnop, “Improvement of Laminate Production Line with Lean Concept,” Journal of Engineering and Innovation, Vol. 18(4), 2025, pp. 65-78.
P. Homsri, A. Krairit, and P. Wisuwan, “An Application of Toyota Production System: A Case Study of Automotive Fuel Tank Manufacturer,” Journal of Engineering, RMUTT, Vol. 1(1), 2012, pp. 11-24.
N. Udomsri, N. Sukachat, P. Trinrachatametee, and W. Wongjinda, “Improving and Upgrading Work to Increase Productivity with Kaizen Techniques for Industry 5.0,” Interdisciplinary Academic and Research Journal, Vol. 5(3), 2025, pp. 263-272.
C. Mongkhonchai, C. Rabob, and P. Vanakul, “Waste Reduction in Cosmetic Inventory Management by Using ECRS Principles,” UMT-POLY Journal, Vol. 22(1), 2026, pp. 39-47.
W. Keaitnukul, “A Line Balancing of the Aluminium Frame Assembly Processes Case Study: A Sample Company,” Thai Industrial Engineering Network Journal, Vol. 4(1), 2018, pp. 49-58.
J. Klunngien, “Heuristic Method for Assembly Line Balancing a Case Study in Refrigerator Factor,” Kasem Bundit Engineering Journal, Vol. 5(2), 2015, pp. 56-69.
B. Phontang, K. Plaengdee, J. Nithikarnjanatharn, W. Nutkhum, and P. Nachaisit, “Optimization of Control Device Circuit Board Production with Kaizen Techniques and U-Shaped Layout,” Thai Industrial Engineering Network Journal, Vol. 11(2), 2025, pp. 75-84.