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David Arifin
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Analisis Lean Manufacturing Untuk Menurunkan Waste Waiting Pada Proses Assembly di PT. Z David Arifin; Muhamad Arman Maulana; Feriyansah Feriyansah; MD. Rafiffallah; Tri Ngudi W
JOURNAL SAINS STUDENT RESEARCH Vol. 3 No. 2 (2025): Jurnal Sains Student Research (JSSR)
Publisher : CV. KAMPUS AKADEMIK PUBLISING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jssr.v3i2.3826

Abstract

This study aims to identify and reduce waiting waste in the assembly process of product X through the application of lean manufacturing principles. The methods employed include value stream mapping, cycle time analysis, and the implementation of 5S. Conducted at PT. Z, the results indicate several significant sources of waiting waste, such as additional movements during material disposal and retrieval, waiting for materials during the buffing process, and machine downtime during the welding bracket process. By applying lean tools such as balanced production, single minute exchange of die, and a kanban system. Furthermore, resource utilization improved, and product quality also showed enhancement. The conclusion of this research emphasizes that lean manufacturing is an effective approach to addressing waiting waste issues in the assembly process and enhancing production efficiency.
Pengaruh Penggunaan Smartphone Terhadap Perubahan Postur Tubuh pada Gen Z Aulia Deswita; David Arifin; Hilmi Rabbani Ferdi; Daffa Satrio Utomo
JOURNAL SAINS STUDENT RESEARCH Vol. 3 No. 2 (2025): Jurnal Sains Student Research (JSSR)
Publisher : CV. KAMPUS AKADEMIK PUBLISING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jssr.v3i2.3955

Abstract

Technological advancements, particularly smartphones, have brought significant changes to modern society. Smartphones serve as multifunctional tools that facilitate various daily activities, such as communication, internet access, and gaming. However, despite their many benefits, excessive smartphone use can lead to negative effects, including addiction and health issues. Data shows that 90% of individuals aged 15-24 own smartphones, with an average internet usage time of 7 hours and 38 minutes per day. Prolonged use of smartphones has the potential to affect posture, causing neck pain, shoulder pain, back pain, and headaches. Improper posture while using smartphones often results in muscle tension in the neck and upper back areas. This abstract aims to highlight the relationship between intensive smartphone use and its impact on the physical health of Generation Z, as well as the importance of maintaining proper posture when using these devices
Co-Authors Aulia Deswita Daffa Satrio Utomo Feriyansah Feriyansah Hilmi Rabbani Ferdi MD. Rafiffallah Muhamad Arman Maulana Tri Ngudi W