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http://journal.uvers.ac.id/index.php/greeners <p><strong>The Journal of Green Engineering for Sustainability</strong> or <strong>Greeners</strong> is published twice a year<strong> (April and September)</strong>. <strong>Greeners</strong> is a scientific media publication that contains engineering research results, especially green engineering. The results of these studies can be in the form of products, designs, ideas, and certain methods that can be described scientifically so that they are able to protect the environmental ecosystem for the better, minimizing risks to human health without sacrificing sustainability and economic efficiency. Although not limited to scientific fields, the scope of discussion or topic of articles received by <strong>Greeners</strong> media editors can include:</p> <ul> <li>Environmental Friendly Production System</li> <li>Manufacturing Processes and Manufacturing Systems</li> <li>Logistics and Distribution Management</li> <li>Packaging Engineering (packaging)</li> <li>Product Design and Development</li> <li>Ergonomics and Work Studies</li> <li>Integrated Waste Treatment System</li> <li>Environmental modeling</li> <li>Solid waste management</li> <li>Water quality</li> <li>Environmental management</li> <li>Renewable energy</li> </ul> <p>We encourage readers to sign up for the publishing notification service for this journal. Use the <a href="http://journal.uvers.ac.id/index.php/gjges/user/register">Register</a> link at the top of the home page for the journal. This registration will result in the reader receiving the Table of Contents by email for each new journal issue. This list also allows the journal to claim certain support or readership. See the journal's <a href="http://journal.uvers.ac.id/index.php/gjges/about/submissions#privacyStatement">Privacy Statement</a>, which assures readers that their name and email address will not be used for other purposes.</p> en-US adinugroho@uvers.ac.id (Ir. Adi Nugroho, S.T., M.Eng) zefri@uvers.ac.id (Zefri Azharman, S.Pd., M.Si) Sun, 31 May 2026 00:00:00 +0000 OJS 3.3.0.4 http://blogs.law.harvard.edu/tech/rss 60 http://journal.uvers.ac.id/index.php/greeners/article/view/334 <p>PT. XXX is a manufacturing fabrication company whose production process still involves non-value-added activities, resulting in a mismatch between planned and actual timelines, including a three-day delay in the production of the Car Body Stand. This study aims to identify value-added and non-value-added activities, calculate cycle time, and analyze Manufacturing Cycle Effectiveness (MCE) by comparing predicted and actual timelines, as well as to propose improvements to enhance production performance. The findings show that total value-added activities reach 480.5 hours, while non-value-added activities account for 41 hours. The predicted cycle time is 467 hours, whereas the actual cycle time extends to 551.5 hours. The MCE is 88.9% under predicted conditions and 85.8% in actual conditions. After implementing the proposed improvements, non-value-added activities decrease to 27 hours, and the cycle time improves to 523.5 hours, leading to an increased MCE of 90.4%. Overall, these results suggest that reducing non-value-added activities can effectively improve production efficiency and reduce delays.</p> Lita Silvianti Rosyadi Copyright (c) 2026 Lita Silvianti Rosyadi https://creativecommons.org/licenses/by-sa/4.0 http://journal.uvers.ac.id/index.php/greeners/article/view/334 Sun, 31 May 2026 00:00:00 +0000 http://journal.uvers.ac.id/index.php/greeners/article/view/332 <p><em>This study is motivated by the importance of efficiency in material handling within warehouse logistics systems, which is influenced by physical factors, particularly the coefficient of friction of floor surfaces. The objective of this research is to analyze the effect of the coefficient of friction on pushing force and the operational efficiency of material handling in warehouses. The method employed is a direct experimental approach by moving a 10 kg load using a trolley over a distance of 5 meters on three types of surfaces: ceramic, wood, and carpet. Each treatment was repeated 20 times. The observed variables include pushing force, travel time, work, efficiency, and coefficient of friction, which were subsequently analyzed using descriptive and inferential statistics. The results indicate that an increase in the coefficient of friction significantly increases the required pushing force and travel time, while reducing system efficiency. The ANOVA test produced a significance value of 0.000 (&lt;0.05), indicating a significant difference among the surface types. Furthermore, Pearson correlation analysis revealed a very strong relationship between the coefficient of friction and pushing force (r = 0.990). Ceramic surfaces yielded the highest efficiency compared to wood and carpet. The study concludes that selecting floor materials with a low coefficient of friction can significantly improve the operational efficiency of material handling in warehouses, making it an important consideration in logistics system design.</em></p> Delia Meldra, Zefri Azharman Copyright (c) 2026 Delia Meldra, Zefri Azharman https://creativecommons.org/licenses/by-sa/4.0 http://journal.uvers.ac.id/index.php/greeners/article/view/332 Sun, 31 May 2026 00:00:00 +0000