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All Journal Journal of Automotive and Mechanical Applied Technology
Kurniawan Sigit Wahyudi
Universitas Negeri Yogyakarta, Indonesia
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Improvement of spare part arrangement with class based storage method and 5S method in spare part room PT. Wahana Sun Solo (Indomobil Nissan Datsun Solo Baru) Faros Sambada; Kurniawan Sigit Wahyudi; Zainal Arifin
Journal of Automotive and Mechanical Applied Technology Vol. 1 No. 2 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v1i1.815

Abstract

The aims of the improvements made in the spare part room at PT. Wahana Sun Solo were to: (1) organize the spare parts storage area based on specifications; and (2) increase effectiveness and work efficiency in locating spare parts while creating a work area that adheres to the 5S method standards set by Nissan Motor Indonesia (NMI). The improvements in the spare part room were implemented through several processes: identifying the spare part room layout, redesigning the storage system using a class-based method, updating labels, and designing the improvement of the 5S method. Testing was conducted by performing a time study and a partman movement study focused on locating three sample spare parts: brake pads, air filters, and fan belts. An assessment index was conducted using an evaluation sheet after the improvements were made. The class-based storage method improvement created a more organized arrangement of spare parts according to types. Updates to labeling and enhancements to the 5S method significantly improved the partman's effectiveness and efficiency. Testing demonstrated that the time required to locate brake pad samples resulted in an efficiency increase of 144%, improvement of 218% for air filters, and improvement of 182% for fan belts. Observations showed that, on average, the partman's search required 5 fewer steps for brake pads, 7 fewer steps for air filters, and 5 fewer steps for fan belts compared to the pre-improvement process. In addition, the observation on the movements involved in locating spare parts resulted in reduced movements by at least two movements. The assessment sheet completed after the improvement yielded an assessment index of 91.2%.
The use of flow rack as an effort to implement kaizen in an effort to increase the production of stepwagon car seats at PT YSC Japan Elgrid Tornado Ridwan; Kurniawan Sigit Wahyudi; Zainal Arifin
Journal of Automotive and Mechanical Applied Technology Vol. 1 No. 2 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v1i1.833

Abstract

This study aims to: (1) analyze the performance data of workers at PT. YSC Japan before the implementation of an innovation involving the addition of a Flow Rack; (2) examine the process of adding the Flow Rack and its impact on worker performance at PT. YSC Japan; and (3) evaluate how the Flow Rack innovation enhances worker productivity at PT. YSC Japan. The study employs the Kaizen concept using the 8-Step Improvement method, with a fishbone diagram utilized for cause-and-effect analysis. Data were collected through observation and documentation, using instruments such as a logbook, observation sheet, and smartphone. Descriptive quantitative analysis was conducted to compare production speeds before and after process improvements. The findings reveal that: (1) PT. YSC Japan required efficiency enhancements, as production on the Line Front Cushion Stepwagon experienced a loss time of 90 seconds per 22 pieces, resulting in a production time of 38.7 seconds per piece; (2) the application of the Kaizen concept, using the 8-Step Improvement method, successfully improved productivity through the addition of a Flow Rack as a storage innovation; and (3) after implementing this change, PT. YSC Japan achieved a 10.3% efficiency improvement, reducing production time to 34.7 seconds per piece.
Optimizing the exhaust system to improve air quality in vehicle service repair shops Hernanda Iqbal Zainul Muttaqin; RR Laksistya Rania Nur Prita Maira; Kurniawan Sigit Wahyudi
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2470

Abstract

Air pollution from vehicle emissions, including NO₂, SO₂, O₃, TSP, and CO, negatively impacts workers' health and reduces work efficiency and productivity. This study aims to (1) develop an exhaust system at the Nissan Mlati ATPM workshop, and (2) determine the effectiveness of the exhaust system. The process of optimizing the exhaust system to improve air quality in the vehicle service repair stall was carried out through a comprehensive design and development project, including design and development phases and tool use. Then, metric volume (theoretical), actual use, and performance efficiency calculations were used. The results of the study show that optimizing the exhaust system at the Nissan Mlati ATPM workshop has been proven effective in increasing airflow capacity, maintaining air quality, and improving performance efficiency. This system can reduce the concentrations of pollutants such as Carbon Monoxide (CO) and Total Suspended Particulate (TSP) and increase workshop productivity without requiring structural design changes. The overall percentage results show a 51.03% increase in value after exhaust system optimization. This exhaust system not only improves air quality but also increases work productivity, which is crucial in the automotive industry's competition.
Co-Authors Elgrid Tornado Ridwan Faros Sambada Hernanda Iqbal Zainul Muttaqin RR Laksistya Rania Nur Prita Maira Zainal Arifin