Lestari, Wahyu Sri (2026) Pengembangan Lean-Green Manufacturing Berbasis Pendekatan Green Value Stream Mapping Untuk Meningkatkan Eco-Efficiency Pada Produksi Kapal. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Industri galangan kapal merupakan sektor manufaktur yang padat energi dan material, sehingga menghadapi tantangan dalam meningkatkan efisiensi operasional sekaligus dituntut untuk mendukung target dekarbonisasi sektor maritim menuju net-zero emission. Pada proses fabrikasi kapal niaga, aktivitas pemotongan, pembentukan, dan perpindahan material melibatkan konsumsi energi yang tinggi serta menghasilkan emisi karbon yang cukup signifikan. Hasil observasi pada Bengkel Fabrikasi menunjukkan bahwa masih terdapat beberapa pemborosan, seperti keterlambatan kedatangan material, penumpukan work-in-process (WIP), perpindahan material yang belum optimal, proses identifikasi material yang masih dilakukan secara manual, serta tingginya aktivitas penyimpanan pada buffer storage. Kondisi tersebut menyebabkan rendahnya aktivitas yang bernilai tambah yang berakibat meningkatnya konsumsi energi dan bertambahnya emisi karbon, serta belum optimalnya efisiensi proses produksi. Berdasarkan hasil pemetaan proses menggunakan Green Value Stream Mapping dan Process Aactivity Mapping, dari total waktu produksi sebesar 2.368 menit, aktivitas bernilai tambah hanya mencapai 172 menit (7%), sedangkan Necessary but Non-Value-Added Activities dan Non-Value-Added Activities masing-masing sebesar 1.198 menit (51%) dan 998 menit (42%). Selain itu, proses steel cutting menghasilkan emisi karbon tertinggi sebesar 305,85 kgCO₂-e atau 63% dari total emisi proses fabrikasi. Teridentifikasi delapan critical waste beserta akar penyebab terjadinya critical waste tersebut. Root cause digunakan sebagai dasar perumusan alternatif perbaikan dan kemudian dilakukan pengolahan Analytical Network Process untuk memperoleh prioritas perbaikan. Hasil ANP diperoleh urutan dan bobot prioritas perbaikan secara berurutan yaitu penerapan Just in Time (0,2698), Pengendalian Work-in-Process (0,2590), Peningkatan efisiensi pengelolaan scrap (0,1660), penataan tata letak (0,1555), dan digitalisasi penerimaan dan identifikasi material (0,1496). Implementasi prioritas perbaikan tersebut diharapkan mampu mengurangi pemborosan, menekan konsumsi energi dan emisi karbon, serta meningkatkan eco-efficiency pada proses produksi kapal niaga.
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The shipbuilding industry is an energy- and material-intensive manufacturing sector, which faces the challenge of improving operational efficiency while also being required to support the maritime sector’s decarbonization targets toward net-zero emissions. In the fabrication process for commercial vessels, activities such as cutting, forming, and moving materials involve high energy consumption and generate significant carbon emissions. Observations at the Fabrication Workshop indicate that there are still several sources of waste, such as delays in material delivery, accumulation of work-in-process (WIP), suboptimal material handling, manual material identification processes, and high levels of activity in buffer storage. These conditions result in a low level of value-added activities, leading to increased energy consumption and carbon emissions, as well as suboptimal production process efficiency. Based on the results of process mapping using Green Value Stream Mapping and Process Activity Mapping, out of a total production time of 2,368 minutes, value-added activities accounted for only 172 minutes (7%), while Necessary but Non-Value-Added Activities and Non-Value-Added Activities accounted for 1,198 minutes (51%) and 998 minutes (42%), respectively. In addition, the steel cutting process generated the highest carbon emissions at 305.85 kgCO₂-e, or 63% of the total emissions from the fabrication process. Eight critical wastes were identified, along with their root causes. The root causes were used as the basis for formulating improvement alternatives, and the Analytical Network Process (ANP) was then applied to determine the priority of these improvements. The ANP results yielded the following order and weights of improvement priorities: implementation of Just-in-Time (0.2698), control of work-in-process (0.2590), improving scrap management efficiency (0.1660), layout optimization (0.1555), and digitizing material receipt and identification (0.1496). The implementation of these prioritized improvements is expected to reduce waste, lower energy consumption and carbon emissions, and enhance eco-efficiency in the commercial ship production process.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Eco-efficiency, Green Value Stream Mapping, Lean-Green Manufacturing, Galangan Kapal, Eco-Efficiency, Green Value Stream Mapping, Lean-Green Manufacturing, Shipbuilding Industry |
| Subjects: | T Technology > T Technology (General) > T58.8 Productivity. Efficiency T Technology > TS Manufactures > TS161 Materials management. T Technology > TS Manufactures > TS176 Manufacturing engineering. Process engineering (Including manufacturing planning, production planning) T Technology > TS Manufactures > TS183 Manufacturing processes. Lean manufacturing. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26201-(S1) Undergraduate Thesis |
| Depositing User: | Wahyu Sri Lestari |
| Date Deposited: | 31 Jul 2026 02:51 |
| Last Modified: | 31 Jul 2026 02:51 |
| URI: | http://repository.its.ac.id/id/eprint/142139 |
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