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All Journal TEKMAPRO Journal of Industrial Engineering and Management JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) The Journal of Pure and Applied Chemistry Research International conference on Information Technology and Business (ICITB) Briliant: Jurnal Riset dan Konseptual Journal of Research and Technology EKONOMIS : Journal of Economics and Business Jurnal Sistem Cerdas Jurnal Teknik Industri Terintegrasi (JUTIN) Budapest International Research in Exact Sciences (BirEx Journal) JURMATIS : Jurnal Manajemen Teknologi dan Teknik Industri Nusantara Science and Technology Proceedings Indonesian Journal of Industrial Engineering & Management Juminten : Jurnal Manajemen Industri dan Teknologi Journal La Multiapp Industrika : Jurnal Ilmiah Teknik Industri Jurnal Penelitian Inovatif Indonesian Journal of Innovation Studies Jurnal Pengbdian Teknik Mesin Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Journal of Social Commerce Eduvest - Journal of Universal Studies The Indonesian Journal of Computer Science Faraday: Journal of Fundamental Physics, Research, and Applied Science Academia Open Jurnal Kendali Teknik dan Sains
Dira Ernawati
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Implementasi Lean Warehousing untuk Meminimasi Waste di Gudang PT XYZ Fitriyah, Jihan; Ernawati, Dira; Rahmawati, Nur
Ekonomis: Journal of Economics and Business Vol 9, No 2 (2025): September
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/ekonomis.v9i2.1916

Abstract

The purpose of this study is to identify waste in the warehousing process using value stream mapping and provide suggestions for improvements to the efficiency of warehousing operations at PT XYZ. This study uses a lean warehousing approach with the value stream mapping method, process activity mapping, gemba shikumi, and 5 whys analysis. The results of this study concluded that improvements by simplifying the process activity mapping resulted in a reduction of 10 warehousing activities, for each type of activity, a reduction of 12 types of activities was obtained. Then the time obtained previously from 268,000 minutes became 266,384 minutes, thus saving 1,616 seconds or 26 minutes 56 seconds at PT XYZ.
Optimizing Raw Material Inventory Control with ABC and Min-Max Methods: Optimasi Pengendalian Persediaan Bahan Baku dengan Metode ABC dan Min-Max Pradinain, Rizky Fadilla; Ernawati, Dira; Dewi, Sinta
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.1648

Abstract

General background: Inventory control is a critical component in the printing industry, where efficiency and accuracy directly affect production continuity and cost management. Specific background: PT XYZ, a printing and packaging company using an offset-based make-to-order system, faces recurring issues of overstock and inefficiency due to the absence of systematic inventory prioritization and stock regulation. Knowledge gap: Prior studies confirm the utility of ABC Analysis and Min-Max Stock methods, but limited research evaluates their combined application in the context of printing industries with fluctuating demand. Aims: This study aims to optimize raw material inventory control of paper and ink through the integration of ABC Analysis and Min-Max Stock methods. Results: Findings reveal that four types of paper and three types of ink fall under category A, and applying Min-Max Stock significantly reduced order frequency and safety stock, achieving cost savings up to 73% for paper and 30% for ink compared to the company’s conventional method. Novelty: The study demonstrates that combining both methods yields higher efficiency and adaptability than using either approach in isolation. Implications: This integrated approach offers strategic guidance for printing companies to achieve sustainable, structured, and cost-effective inventory management. Highlights: Significant cost savings achieved (up to 73% for paper, 30% for ink). Integration of ABC and Min-Max methods ensures efficient and adaptive control. Provides strategic guidance for sustainable inventory management. Keywords: Inventory Control, ABC Analysis, Min-Max Stock, Raw Materials, Cost Efficiency
Life Cycle Assessment Analysis of Corrugated Carton Box Production Process to Measure Eco-Efficiency Level Fatmawati, Erliansa; Ernawati, Dira; Dewi, Sinta
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2220

Abstract

The production of carton boxes is an energy-intensive process that generates various contaminants, polluting water and air, and affecting both ecology and human health. This study focuses on the environmental impact during the carton box production process at PT XYZ, aiming to calculate and analyze the environmental impact while measuring the eco-efficiency level of the production process. The research method employed in this study is quantitative descriptive, with primary data sources consisting of interviews, while secondary data includes company reports. Data were processed using SimaPro software and the Eco Indicator 99 method. Eco-efficiency measurement was conducted using the Life Cycle Assessment approach. The results indicate that the production of 1 ton of carton boxes generates an environmental impact of 315 Pt, with the largest contributions coming from the corrugating, folding, and customer delivery stages. The eco-cost value was IDR8,922,503, yielding an eco-efficiency index of 1.34, indicating that the production process is environmentally friendly and economical. However, the eco-efficiency ratio of 25.6% is still considered low, necessitating improvements in energy efficiency and emission reduction. Recommended improvements include substituting fossil fuels with renewable energy, selecting environmentally friendly suppliers, and replacing or modifying machinery to enhance efficiency and reduce emissions.
Implant Design Femur Bone using CAD Computation with Variation in Implant Plate Length Az Zahra, Ladya Cheril; Sudrajat, Oka Akbar; Santika, Arum Sinda; Ernawati, Dira; Sujiwa, Akbar
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 1 (2025): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v1i1.9

Abstract

Femoral fractures are among the most common and severe musculoskeletal injuries, necessitating effective and reliable treatment strategies. This study explores the biomechanical performance of femur implants by evaluating the effects of material selection and implant design using the finite element method (FEM). Three biocompatible materials—titanium alloy Ti-6Al-4V, stainless steel, and PEEK—were analyzed under linear elastic isotropic conditions. Implant designs varied in length (10.02 mm, 13.37 mm, and 15.60 mm) with a fixed head thickness of 3 mm. Simulations assessed stress distribution, deformation, and overall structural performance under physiological loading conditions. Results demonstrated that implant length significantly affects mechanical behavior. The 15.60 mm implants exhibited the most uniform stress distribution and minimal deformation, indicating superior mechanical stability. In contrast, shorter implants (e.g., 10.02 mm) showed increased stress concentrations and deformation, suggesting a higher risk of mechanical failure. Among the materials tested, Ti-6Al-4V outperformed others due to its favorable combination of strength and biocompatibility. The study concludes that longer implants made from titanium alloy provide improved structural integrity, offering safer and more durable options for femoral fracture repair. These findings contribute to the optimization of implant design for enhanced clinical outcomes in orthopedic applications
Analysis Of Core Supply Chain Process Performance Based On The Lean Six Sigma Supply Chain Management Approach (Case Study: PT Pg. Candi Baru) Arifano, Krisna Ramadhian; Ernawati, Dira; Dewi, Sinta
Eduvest - Journal of Universal Studies Vol. 4 No. 7 (2024): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v4i7.1253

Abstract

The aim of the research is to integrate the lean six sigma supply chain management concept to design and measure performance measurement models and determine the causes of company performance failures and then provide recommendations for improvement according to the lean concept. This research was carried out only up to the improvement stage. The result of this research is an overall performance measurement of 66.6666 where this value can be categorized as "Average". This value shows that supply chain management activities at PT. PG Candi Baru is running moderately and obtained 9 KPIs that have not reached the target. Waste is the cause of the 9 KPIs not achieving the target, namely waste defects, waiting, not utilizing employee knowledge, skills and abilities and extra processing. Recommendations for improvement given to the company to reduce the occurrence of waste are: For defects in sugar quality, the proposed improvement is to carry out milling in accordance with established standards and use raw materials that comply with specifications. When waiting for raw materials to be late, the proposed improvement is that the plant department must carry out earlier purchasing planning to avoid waste waiting and prioritize TS suppliers because they have a higher weight than other suppliers. The proposed improvement for the production department is training on how to forecast production scheduling. In extra processing, the proposed improvement is that the company can provide a quality control list when inspecting the finished product so that the inspection is more controlled.
Penerapan Metode Lagrange Multiplier untuk Meminimalkan Biaya Persediaan Material Plat di PT. PAL Indonesia (Persero) Setiawan, Agung; Ernawati, Dira
BRILIANT: Jurnal Riset dan Konseptual Vol 8 No 3 (2023): Volume 8 Nomor 3, Agustus 2023
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v8i3.1461

Abstract

PT. PAL Indonesia adalah industri galangan kapal terbesar di Indonesia. Permasalahan yang terjadi ialah kurang optimalnya sistem pengendalian persediaan bahan sehingga mengakibatkan pembengkakan biaya persediaan dan overcapacity gudang. Penelitian ini bertujuan untuk menentukan jumlah optimal persediaan bahan baku untuk meminimalkan total inventory cost dan ruang penyimpanan. Metode yang digunakan adalah Lagrange Multiplier. Berdasarkan hasil penelitian, metode Lagrange Multiplier memperoleh total ruang penyimpanan baru 507 . Nilai ini memperlihatkan keadaan optimal karena pesanan tidak melebihi kapasitas penyimpanan PT. Pal Indonesia yaitu 510  dengan jumlah pemesanan setiap jenis plat sebagai berikut plat 8 mm 27 ton, plat 9 mm dari 28 ton, plat 11 mm dari 35 ton, dan metode usulan Lagrange Multiplier dapat meminimalkan total inventory cost sebesar Rp 387.180.637.
Evaluasi Pemilihan Sustainable Supplier Dolomit Dengan Metode FAHP dan TOPSIS Di PT. Petrokimia Gresik Nuswantoro, Wira Yudha; Ernawati, Dira; Nugraha, Isna
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 3 (2025): Volume 10 Nomor 3, Agustus 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i3.1912

Abstract

PT. Petrokimia Gresik, the most comprehensive fertilizer agro-industry company in Indonesia, produces a product called Filler Plus, which requires dolomite as a raw material. Amid pressure from the government, especially on environmental issues, companies are creating production strategies that are environmentally friendly but also prioritize economic factors (economic profits) and the impact on the social environment. One of these strategies can be done by selecting the right supplier. This research evaluates supplier performance based on sustainable aspects (economic, environmental, social) using the cut-off point method for selecting sub-criteria, FAHP for weighting sub-criteria, and TOPSIS for ranking suppliers based on predetermined sub-criteria. This study uses qualitative and quantitative approaches. The research results show that supplier S2 is ranked highest with a coefficient value of 0.826, followed by S3 (0.442), S4 (0.357), and S1 (0.256). This study can serve as a basis for strategic decision-making in selecting sustainable dolomite suppliers by considering the most relevant criteria and sub-criteria.
Identifikasi Pemborosan Dengan Pendekatan Lean Warehouse Pada Gudang Oli di PT ABC Ardysti, Amelia Ramadhani; Ernawati, Dira
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 3 (2025): Volume 10 Nomor 3, Agustus 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i3.1915

Abstract

Warehouses have an important role because they influence operational activities in a company's business processes. PT. ABC is one of Pertamina's official distributors which is engaged in logistics and distribution activities for oil, fuel, and heating products. In carrying out its operational activities, PT. ABC is still faced with various problems. The occurrence of delivery delays due to waiting times that are too long is the main problem at PT. ABC. Therefore, this research aims to identify waste and provide recommendations for improvements to warehousing activities. The lean warehouse approach is used to identify and eliminate waste through value stream mapping and process activity mapping tools. The research results were obtained through predictions of the proposed improvement recommendations, where it can be seen that the highest type of waste is waiting. After the proposed improvements, warehousing activity time decreased from 526 minutes to 355 minutes. In addition, the overall efficiency of warehousing activities increased by 22.14%, from the previous 47.72% to 69.86%.
Penilaian Sustainable Supply Chain Management Dengan Metode Life Cycle Assessment (Studi Kasus: Produk Tepung Bumbu, PT XYZ) Moch. Annas Hidayatulloh; Ernawati, Dira; Dewi, Sinta
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 2 (2025): Volume 10 Nomor 2, Mei 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i2.2159

Abstract

Industrialization in Indonesia contributes significantly to increased emissions. PT XYZ as a seasoning producer faces challenges in managing the environmental impact of its supply chain activities, especially in seasoning flour products which have the highest productivity reaching 25,793 tons in 2023. This study aims to measure the level of emissions generated during the supply chain process of seasoning flour products using the Life Cycle Assessment (LCA) method with a gate to gate approach. Data collection was carried out through interviews and secondary data collection from company documents related to process procedures, energy consumption, raw material usage, and supply chain operational data. Data was processed using SimaPro 9.0 software with the ReCiPe 2016 Midpoint method. The results showed a high level of emissions. The terrestrial acidification category reached 4.97 kg.SO₂, far above the standard limit of 600 mg.SO₂ per year. Normalization results identified the production stage as the largest contributor with three categories of marine ecotoxicity (27.3), freshwater ecotoxicity (17.5), and human carcinogenic toxicity (13.5). The high emissions are caused by significant electricity consumption for operational systems and production machinery, as well as transportation use. Recommendations for improvement include optimizing production energy, managing machine operating time, utilizing solar panels, and others.
Reducing Waste in the Delivery System through Lean Distribution: Implications for Social Commerce Logistics Agustin, Melinda Dwi; Ernawati, Dira
Journal of Social Commerce Vol. 5 No. 2 (2025): Journal of Social Commerce
Publisher : Celebes Scholar pg

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56209/jommerce.v5i2.156

Abstract

This paper explores structural inefficiencies that have been engrained into the delivery procedures, a distributor of industrial gas products, in the context of wastage reduction and improvement on logistic responsiveness, by means of adopting lean distribution. An initial inspection identified extended lead time and operational delays based on delays based on waiting and transport inefficiencies as well as redundant motion, which signified a tangled and non-integrated workflow that was document dependant. Combining Process Activity Mapping (PAM), root cause analysis and 5W+1H technique, the work produced vital, non-value-added activities and recommended focused interventions to reinstate process flow and timing purity. The endeavours of the implementation of the lean-based redesign served to cut down the total time of lead by 14.6 per cent largely through removing the actual bottlenecks in the procedure and also making coordinated handovers on a digital platform. In addition to enhancing efficient stages, the research illustrates that lean distribution serves as a form of structural redesign, which shifts the delivery process out of the series of sequential activities to an integrated, real-time, and demand-oriented system. Such findings validate the view that to enhance the logistics performance in this kind of time-sensitive environment, a reduction of waste is not a sufficient condition but rather a planned transition to digitally-assisted, flow-based process configurations.
Co-Authors Adhella Ika Putri Aditya Tri Pratama Afrul Mufdi Thobarsi agung setiawan Agustin, Melinda Dwi Akbar Sujiwa Akmal Suryadi Aldo Wicaksono Amel, Amelia Purbaningtyas Andita Rizki Ramadani Andy Dwi Feriansyah Aprilia Kurnia Ardysti, Amelia Ramadhani Arifano, Krisna Ramadhian Ayu Agustina Suryani Az Zahra, Ladya Cheril Bossa No Va Dewi Seda Mera Dodo Zulfikar Dyah Suci Perwitasari Erlina Erlina Erlina Purnamawati Fatmawati, Erliansa Febridan Dzulkifli Fitriyah, Jihan Hasbi Assiddiqi Hayati, Kinanti Resmi Hayati, Kinanti Resmi Iqbaal Ahmad Izzuddin Joumil Aidil Saifuddin Kuswara, Ramadana Esa Luky Noviansyah Lutvia Agustin M Satria Adiyatma Nugraha Maghfiroh, Marjiatul Mahardika Brave Revaldiwansyah Marbun, Chandra Ericson Maulana, Alfin Bima Maunah, Dewi Aisarunnisa' Mera, Dewi Seda Moch. Annas Hidayatulloh Mohammad Alfin Al Farih Mohammad Ridho Permana Muhammad Trisyadi Waluya Jati Nabilla Nabilla Nanang Teguh Teguh Ni Ketut Sari Nugraha , Isna Nugraha, Isna Nugroho, Aldi Pramoedya Nur Aini Fauziyah Nur Rahmawati Nur Rahmawati Nur Rahmawati Nuswantoro, Wira Yudha Perdiansyah, Muhammad Ilham Pradata, Amelia Putri Pradinain, Rizky Fadilla prakosa, albertus Adriyanto Prastyo Utomo Raditya Y E Rafi Fadlurrahman Firjatullah Rahmadhani, Talitha Vania Riska Dewi, Nanda Riska Tia Wulandari Rizka Novitasari Rochman, Mohammad Habibur Rr. Rochmoeljati Sa'idan, Gading Adian Kun Safirin, Moch. Tutuk Sakiyatuddurriyah, Sakiyatuddurriyah Salsa Billa Kharisma Santi Wulandari Santika, Arum Sinda Sari, Komang Nickita Satya , Mas Tangguh Afritza Setiyadi, Nanda sholeha, fitriatus Sholihin, Farhan Aufa Sidabutar, Naomi Sinta Dewi Sinta Dewi Sudrajat, Oka Akbar Tauriza Alfiane, Revica Tranggono Tranggono Tranggono Wirawan Wijaksono Walddeon Yekti Condro Winursito