ENG
INA
94th Doctoral Promotion
Promovenda Ir. Ellysa Kusuma Laksanawati, ST., MT., IPM., ASEAN Eng., ACPE, succeeded in her doctoral dissertation exam and became the 94th PhD of the Study Program of Doctoral Engineering Science (PSDIT), Faculty of Engineering, Udayana University. The dissertation titled Manufacturing System Design through the Implementation of LEAN and IOT on Worker Activities in the Sewing Department in the Shoe Industry, received a very satisfactory predicate.
Dr. Ir. Ellysa Kusuma Laksanawati explains that the footwear industry often faces efficiency and productivity challenges in the sewing department, which are typically addressed by implementing Lean principles or IoT technology separately. However, effective optimization of worker activities and production processes can be achieved through the integration of both approaches. This study aims to design an efficient manufacturing system by comprehensively integrating Lean and IoT into worker activities in the sewing department of a footwear industry. This approach is expected to reduce waste, increase worker effectiveness, and provide insight into the impact of the proposed system, which has not been widely explored in an integrated manner in the footwear industry context.
This study used quantitative methods with a treatment-by-subject design. Data were analyzed before and after the implementation of the designed system to measure changes in efficiency, waste reduction, and quality improvement. Additionally, observations and interviews were conducted to obtain a detailed overview of worker activities, work processes, and responses to the new system. This approach allows for a comprehensive and empirical evaluation of the impact of Lean and IoT integration in a real-world work environment.
The results show that the implementation of the designed manufacturing system has a significant positive impact. Time wastage was significantly reduced (?< 0.05) by 1,303.21 seconds, or 69.46% faster; material wastage was significantly reduced (?< 0.05) by 192 seconds, or 15.384% more products, and transportation wastage was significantly reduced (?< 0.05) by 115.97 seconds, or 78.157% faster. The implementation of IoT changed the layout design with conveyors and integrated the pounching and eyeletting machines into built-in machines. The manufacturing system design that could be implemented included setting a 15-minute work time with a 1-minute break, improving motion economy, and improving work activity-based SOPs. These findings support the potential of integrating Lean and IoT to improve the efficiency and productivity of the sewing department in the shoe industry.
The promoter, co-promoters I and II, are Prof. Dr. Tjokorda Gde Tirta Nindhia, S.T., M.T., M.Eng., Prof. Dr. Ir. Made Sudarma, MASc., IPU., ASEAN Eng, and Prof. Dr. Ir. Wahyu Susihono, ST., MT, respectively.
FACULTY OF ENGINEERING