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All Journal OPERATION EXCELLENCE: Journal of Applied Industrial Engineering Industri Inovatif : Jurnal Teknik Industri Indonesian Journal of Industrial Engineering & Management JURNAL TEKNIK INDUSTRI Factory Jurnal Industri, Manajemen dan Rekayasa Sistem Industri Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Wahyuda, Wahyuda
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Analysis of 220 ml cup supplier selection with AHP method and rating scale: case study PT. sabina tirta utama Lumenta, Karine Nathania; Wahyuda, Wahyuda; Gunawan, Suwardi
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 2, (2023): OE July 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i2.082

Abstract

PT. Sabina Tirta Utama is a company that produces Bottled Drinking Water (AMDK) in 220 ml cup packaging. The company has problems related to 220 ml cup suppliers such as found in cup packaging with holes when the goods arrive, the quantity does not match the demand so the company needs suppliers who match the company's criteria and produce good quality packaging through supplier selection and assisted with the selection method. decision. The method used in supplier selection is AHP and rating scale. The AHP method is used to obtain global weight values which are then used to assist in ranking with the rating scale method. The purpose of this study was to determine the criteria and sub-criteria for a 220 ml cup and to identify priority suppliers. Supplier selection using 5 criteria and 11 sub-criteria. AHP weighting results on quality criteria is 0.197, price with a weight result of 0.296 delivery with a weight result of 0.401, communication system with a weight result of 0.035, and packaging capability of 0.07. The results of supplier ranking with a rating scale obtained the priority of the first supplier with a final assessment result of 3.551, namely supplier A with a high-performance category. Meanwhile, another alternative priority is supplier B with a final result of 2.641 in the performance category according to standards.
Soybean Inventory Management at Gesit Tahu Factory Using the Economic Order Quantity (EOQ) Method Hidayat, Rahmat; Wahyuda, Wahyuda; Sitania, Farida Djumiati
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 2: June 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i2.22938

Abstract

Gesit Tahu is a small-scale factory engaged in the tofu industry, in the production process is closely related to the supply of the main raw material, namely soybeans. Gesit Tahu has not been optimal in controlling the level of raw material inventory where this factory has experienced a shortage of soybean inventory due to high demand, so it requires a method that can optimize raw material purchases and minimize inventory costs, the right method in solving this problem is using the Economic Order Quantity (EOQ) method. The purpose of this study is to determine the inventory control of Gesit Tahu soybean raw materials by comparing the current inventory management policy at the factory and using the EOQ method. The results of this study that inventory control is more efficient using the EOQ method, it is proven that it can make savings from the cost factor that must be incurred, it can be seen that if the Gesit Tahu factory applies the EOQ method, namely IDR 2,223,077,461, it is a minimum compared to the factory policy method within one year, which is IDR 2,223,619,662. The optimal order quantity for soybean needs is 72.87 sacks (73 sacks) for one order. The frequency of ordering soybean needs is 43.49 or 44 times/year. The calculation of safety stock to anticipate unexpected shortages is 1.64 sacks or 2 sacks. The calculation of the reorder point obtained to determine the point at which the order is placed again so that the ordered goods arrive on time before the inventory runs out is 21.93 sacks or 22 sacks.
Soybean Inventory Management in the Production Process of the Semoga Laris Tofu Factory Putrianti, Elsa Eka; Wahyuda, Wahyuda; Sitania, Farida Djumiati
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 2: June 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i2.24140

Abstract

Semoga laris tofu factory is one of the food industry businesses, where the factory processes soybeans into tofu products. The problem that occurs in the management of inventory at the semoga laris tofu factory is that the factory tends to be unprepared for unexpected circumstances, which is caused by the fact that the value of safety stock on raw material inventory has not been determined. At the semoga laris tofu factory hopefully laris there are also capital restrictions on the purchase of raw materials, where the available capital is IDR 30,000,000. This study aims to evaluate the inventory management carried out by the factory by comparing the Min-Max Method, the Economic Order Quantity (EOQ) Method with the tofu factory policy, which after obtaining the optimal Q is then calculated using the working capital constraint method if the results of the optimal Q cannot be met by the available capital. Based on the results of calculations carried out in this study, calculations with the Basic EOQ method have more optimal Q results compared to other methods. However, the basic EOQ calculation exceeds the existing capital limit, because the cost of purchasing raw materials costs IDR 105,450,000. Based on the existence of capital-related restrictions, the calculation is continued with the capital constraint EOQ method. EOQ with this capital constraint has a quantity for one order of 52 bags with a capital cost of IDR 29,640,000.
ANALISIS PENGENDALIAN PERSEDIAAN BERAS MENGGUNAKAN METODE SILVER-MEAL PADA PERUM BULOG KOTA SAMARINDA Mubarog, Resky; Wahyuda, Wahyuda; Suh Utomo, Dutho
Industri Inovatif : Jurnal Teknik Industri Vol 14 No 1 (2024): Inovatif Vol. 14 No. 1
Publisher : Prodi Teknik Industri S1 Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/industri.v14i1.9405

Abstract

Salah satu cabang dari Perum Bulog ini berlokasi di Kota Samarinda. Perum BULOG Kota Samarinda memiliki permasalahan pada sistem pengendalian persediaan yaitu minimnya stok beras pada gudang. Membutuhkan metode pengendalian persediaan yang tepat untuk mengatasi ketersediaan beras sehingga meminimalisir terjadinya kekurangan beras saat dibutuhkan dan juga pada proses pemesanan. Setelah melihat plot data historis yang cenderung membentuk pola stationer, serta melakukan uji variabilitas dengan hasil lebih besar dari 0,25,sehingga data bersifat dinamis. Metode yang digunakan pada penelitian ini yaitu dengan perhitungan Peramalan (Forecasting), peramalan permintaan yang terpilih adalah moving Average pada rata rata bergerak pada 9 bulanan yang karena memiliki nilai error terkecil, yaitu MAD sebesar 26703,61, MSE sebesar 1698270204,17, dan MAPE sebesar 21,01%, didapat hasil peramalan untuk 12 periode kedepan diperkirakan sebesar 1.298.360 kg atau 25.968 sak. Pada pengendalian persediaannya menggunakan metode silver-meal menghasilkan frekuansi pemesanan sebanyak 24 kali dengan total penghematan sebesar 28,691% dan selisih Rp986.865,33 dari perusahaan.
Inventory Planning and Control on Packaging Raw Materials in the Bottled Drinking Water Business (AMDK) PT XYZ Samarinda City Wahyudi, Muhammad; Wahyuda, Wahyuda; Sitania, Farida Djumiati
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.23691

Abstract

The production of bottled drinking water (AMDK) has growth of 10.4% from 2010 to 2019. One of the AMDK companies located in Samarinda City is PT XYZ. The produced product is water packaged in 220 ml glass containers. The raw materials for the 220 ml water packaging product include cups, cup lids, straws, cardboard boxes, and cardboard dividers. The AMDK business operated by PT XYZ has only been in operation since 2021, and there is currently no inventory planning and control for the raw materials used in the packaging of the 220 ml AMDK product. This has resulted in a lack of packaging raw material inventory, thus hindering the AMDK production process in the company. Based on this issue, this research is conducted to plan and control the inventory of 220 ml water packaging raw materials at PT XYZ, in order to optimize inventory costs and meet consumer demand for AMDK. Inventory planning and control are carried out using the Material Requirement Planning (MRP) method, and the method used to determine the lot size is the Economic Order Quantity (EOQ) method with shipping capacity constraints. Based on the data processing conducted, the optimal order quantities using the EOQ method with shipping capacity constraints for each packaging raw material are 15.000 pieces for cardboard and cardboard dividers with an inventory cost of IDR 267.112.900. 1.500.000 pieces for straws with an inventory cost of IDR 46.831.630. 540.000 pieces for cups with an inventory cost of IDR 232.026.718. 150 rolls for cup lids with an inventory cost of IDR 87.125.910. The total inventory cost for packaging raw materials for 220 ml AMDK cups is IDR 633.097.158. 
Strength Evaluation of Combined New and Old Plates Welded Joint: Case of Anggada XV Tug Boat Nurcholik, Samsu Dlukha; Wahyuda, Wahyuda; Hidayat, Taufik; Arifuddin, Andi Mursid Nugraha; Kurniawati, Diniar Mungil; Saadiyah, Devy Setiorini; Awali , Jatmoko; Rohimsyah, Fikan Mubarok; Trimulyono, Andi; Kusuma, Andhi Indira
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1069

Abstract

Naval grade plate is designed for shipbuilding due to its strength. In the shipyard, old plates have been used because surplusage of the previous project. However, the mechanical properties of old plate compared to new plate have not been clarified yet. In this study, a comparative investigation shielded metal arc welding (SMAW) of old plate and new plate was performed. A spectroscopy test was used to obtain the chemical properties of the old plate and the new plate. Furthermore, tensile and hardness tests were performed to investigate the mechanical properties It was concluded that (1) the chemical properties of the old and new plates are almost similar and (2) the average value of tensile strength of the old-old plate, new-new plate, and new-old plate are 451.3, 487, 454,3 N/mm2, respectively. (3) then, the average hardness test of HAZ of old plate, new plate, and weld metal are 73.2, 78.3, 83.2 HRB, respectively. From the results, it can be concluded that using old plates for shipbuilding is still reliable.
Perancangan dan Pengukuran Kinerja Rantai Pasok dengan Menggunakan Metode SCOR pada CV Sabina Tirta Maskub Febrianice, Febrianice; Wahyuda, Wahyuda; Sukmono, Yudi
Factory Jurnal Industri, Manajemen dan Rekayasa Sistem Industri Vol. 3 No. 3 (2025): Edisi April
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/factory.v3i3.838

Abstract

CV Sabina Tirta Maskub adalah industri yang bergerak dalam bidang pembuatan dan distribusi air mineral dalam bentuk gelas. Sejak tahun 2014 berdirinya perusahaan tersebut tidak pernah melakukan pengukuran kinerja rantai pasok. Selain itu, perusahaan juga memiliki tantangan karena gudang yang terbatas dan kurangnya pemahaman terkait peramalan permintaan. Dalam menghadapi tantangan masalah tersebut, penelitian ini bertujuan untuk merancang dan mengukur kinerja rantai pasok pada CV Sabina Tirta Maskub sehingga dapat mengevaluasi serta mengidentifikasi tindakan perbaikan yang dibutuhkan oleh perusahaan. Kemudian, penelitian ini dilakukan dengan menggunakan pendekatan metode SCOR (Supply Chain Operations Reference) untuk memenuhi tujuan tersebut dan diintegrasikan dengan beberapa metode pendukung, yaitu metode AHP, OMAX, TLS, serta fishbone diagram. Pada hasil penelitian diperoleh 16 rancangan KPI kinerja rantai pasok yang telah divalidasi oleh manajer perusahaan. KPI tersebut terbagi ke dalam proses inti rantai pasok seperti plan, source, make, deliver, dan return. Berdasarkan indikator produktivitas (IP) dalam metode OMAX diketahui bahwa kinerja rantai pasok sebesar -64,99% yang berarti mengalami penurunan dari periode standar. Setelah dilakukan analisis diketahui terdapat 8 KPI yang perlu diberikan usulan perbaikan. Namun sebelum diberi usulan perbaikan, penyebab masalah pada indikator-indikator tersebut dianalisis menggunakan fishbone diagram sehingga diperoleh 6 usulan perbaikan untuk kinerja rantai pasok CV Sabina Tirta Maskub.
Conceptual Model of Lean Sustainable Supply Chain for The Footwear Industry Surjasa, Dadang Surjasa; Wahyuda, Wahyuda; Marie, Iveline Anne Marie
JURNAL TEKNIK INDUSTRI Vol. 15 No. 2 (2025): July 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Indusri Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jti.v15i2.20184

Abstract

Companies are adapting to the era of globalization, striving to remain competitive amid global pressures such as climate change and consumers who are increasingly critical of sustainability issues. The footwear industry has several factors that affect the environment, such as short product life cycles, high demand volatility, and many manufacturing process failure risks. Forty different materials used in the footwear manufacturing process, such as textiles, synthetics, leather, EVA, rubber, and TPU, impact sustainability. This study creates a conceptual model for designing a Lean Sustainable Supply Chain and Quality Risk Management model. The concept of lean and sustainability is the basic foundation for the footwear industry to be more competitive. Furthermore, the research uses the DMAIC (Define, Measure, Analyze, Improve, Control) approach from Six Sigma to integrate the lean sustainability method in the supply chain to increase the efficiency of the footwear industry. A case study was conducted on the footwear industry in the city of Serang. The research results are a conceptual model to increase process efficiency and improve quality in the Sustainable Supply Chain network. This Model improves quality by reducing variations, reducing the risk of failure, and creating a sustainable supply chain network by integrating DMAIC and Lean sustainable supply chain in the footwear industry.
Co-Authors Andi Trimulyono Arifuddin, Andi Mursid Nugraha Awali , Jatmoko Dutho Suh Utomo Febrianice, Febrianice Gunawan, Suwardi Kurniawati, Diniar Mungil Kusuma, Andhi Indira Lumenta, Karine Nathania Marie, Iveline Anne Marie Mubarog, Resky Muhammad Wahyudi Putrianti, Elsa Eka Rahmat Hidayat Rohimsyah, Fikan Mubarok Saadiyah, Devy Setiorini Samsu Dlukha N Sitania, Farida Djumiati Surjasa, Dadang Surjasa Taufik Hidayat Yudi Sukmono, Yudi