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All Journal Biospecies Edu-Sains: Jurnal Pendidikan Matematika dan Ilmu Pengetahuan Alam Jurnal Natur Indonesia AL KAUNIYAH SPEKTRUM INDUSTRI TEKMAPRO Journal of Industrial Engineering and Management Inspiratif Pendidikan Edukasi: Jurnal Pendidikan dan Pengajaran OPERATION EXCELLENCE: Journal of Applied Industrial Engineering PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Jurnal Penelitian Pendidikan IPA (JPPIPA) JATI UNIK : Jurnal Ilmiah Teknik dan Manajemen Industri Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri Metode : Jurnal Teknik Industri Jurnal Biologi Tropis Tibuana : Journal of Applied Industrial Engineering Martabe : Jurnal Pengabdian Kepada Masyarakat BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology) Industri Inovatif : Jurnal Teknik Industri Matrik : Jurnal Manajemen dan Teknik Industri Produksi Dedikasi: Jurnal Pengabdian Masyarakat Community Development Journal: Jurnal Pengabdian Masyarakat Indonesian Journal of Law and Economics Review Jurnal Filsafat Indonesia Jurnal Senopati : Sustainability, Ergonomics, Optimization, and Application of Industrial Engineering Indonesian Journal of Innovation Studies BIOMA : Jurnal Biologi dan Pembelajarannya Jurnal Literasi Pendidikan Fisika (JLPF) Jurnal Pengabdian Masyarakat Akademisi PELS (Procedia of Engineering and Life Science) Jurnal Teknologi dan Manajemen Industri Terapan Takuana: Jurnal Pendidikan, Sains, dan Humaniora Jurnal Karya Abdi Masyarakat Journal of Fish Health MIMBAR INTEGRITAS Jurnal Pengabdian Masyarakat Pinang Masak Innovative Technologica: Methodical Research Journal Physical Sciences, Life Science and Engineering Journal for Technology and Science Biodik: Jurnal Ilmiah Pendidikan Biologi Jurnal Natur Indonesia IJOT Widya Teknik Academia Open Biodiversitas Journal of Biological Diversity International Journal of Economic Integration and Regional Competitiveness
Tedjo Sukmono
Program Studi Teknik Industri Universitas Muhammadiyah Sidoarjo
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Ichthyofauna Biodiversity in Lake Kelari Within the Muaro Jambi National Cultural Heritage Area as a Basis for Establishing a Lubuk Larangan Wulanda, Yoppie; Sukmono, Tedjo; Yunita, Lauura Hermala; Magwa, Rizky Janatul; Putra, Tri Syukria; Utomo, Pradita Eko Prasetyo
Journal of Fish Health Vol. 5 No. 2 (2025): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v5i2.6451

Abstract

Lake Kelari is located in the Muaro Jambi National Cultural Heritage Area (KCBN) and has ecological and economic value as a habitat for various species of fish. This study aims to identify the biodiversity of the lake, conservation status, global distribution, and fish biodiversity index in the lake, which can be the scientific basis for the establishment of the proclamation pit as an in-situ conservation effort. The method used is a survey method including the collection of primary data through fishing using nets, bubu, and fishing rods in the 2023 rainy season and the 2024 dry season, as well as measuring water quality and habitat character. The results of the study show that the biodiversity of ikhtiofauna in Lake Kelari includes; 13 species, 13 genera and 7 families. The biodiversity index shows medium criteria. Lake Kelari has the potential as an insitu conservation area with the discovery of a species of senggiringan fish (Hemibagrus planicep) which has the status of Data Vulnerable in the IUCN Red List. Most of the species found are consumption fish, and some others are ornamental fish. The riparian vegetation found varied, the water quality was relatively maintained, and the absence of introduced fish showed the natural environment of Lake Kelari. In conclusion, Lake Kelari has medium fish biodiversity index with important conservation and economic value. The implementation of the ban can be a strategic step in maintaining fish populations and supporting the sustainability of the ecosystem and local economy.
PENGENDALIAN PERSEDIAAN BAHAN BAKU OBAT DENGAN MENGGUNAKAN METODE EOQ PROBABILISTIK BERDASARKAN PERAMALAN EXPONENTIAL SMOOTHING PADA PT. XYZ Fila Dristiana; Tedjo Sukmono
Spektrum Industri Vol. 13 No. 2: Oktober 2015
Publisher : Universitas Ahmad Dahlan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v13i2.2695

Abstract

PT. XYZ is one of the manufactures of parmacheutical. Problems which often appeared are surplus and shortage material. Inventory material control not optimum because order only esimate. With exponential smoothing method can be devise of demand next period and EOQ Probabilistic for to know economic order quantity, total safety stock and reorder point so can minimization inventory cost. Purpose of research are to know exponential smoothing method what representatif for manufacture and give recomendation of this research. Results of research are exponential smoothing method representatif for manufacture and EOQ probabilistic method for Antalgin, Paracetamol and Piroxicam material are economic order quantity in the amount of 313 kg, 928 kg and 33 kg, safety stock 160 kg, 403 kg and 2kg and reorder point 325 kg, 1080 kg dan 14 kg. So total inventory cost of Antalgin, Paracetamol and Piroxicam material in the amount of Rp.3.847.146, Rp.5.025.081 and Rp.1.932.255. Keyword : Inventory, Exponential Smoothing, EOQ Probabilistic
PENGUKURAN KINERJA MESIN PRODUKSI MENGGUNAKAN METODE OVERALL THROUGHPUT EFFECTIVENESS GUNA MENINGKATKAN HASIL PRODUKSI DI PT XYZ Sigit Wahono; Tedjo Sukmono
Spektrum Industri Vol. 15 No. 2: Oktober 2017
Publisher : Universitas Ahmad Dahlan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v15i2.7553

Abstract

PT XYZ is one manufacturing company engaged in the production of animal feed. In the production process sometimes product results does not comply with the requests received by the company. There are many factors which could this problem happened. One of them is less than the maximum engine performance production caused by high downtime on a production machine. To find out how well the performance of a production machine, then it is held a performance assessment by using Overall Throughput Effectiveness (OTE) method.Overall Throughput Effectiveness calculations performed on the line pellet machine was obtained 48.97%. This value is still far to the standard value desired by the company which is 70%. For performance improvement can be done by improving the engine damaged and analyzed by using Failure Mode and Effect Analysis (FMEA). From the analysis showed that the failure modes of root dies breaking up with the value of the RPN 224 is a damage that must be repaired immediately because obtaining the highest RPN value compared to other failure modes.Keywords: Measurement of engine performance, OEE, OTE, FMEA
ANALISIS KELAYAKAN INVESTASI ALAT PULLER PADA MESIN CORE UNTUK MENURUNKAN CYCLE TIME DI CV XYZ Rudy Bowo Leksono; Tedjo Sukmono
Spektrum Industri Vol. 16 No. 1: April 2018
Publisher : Universitas Ahmad Dahlan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v16i1.9777

Abstract

Strategi global purchasing yang diterapkan oleh perusahaan produsen kendaraan bermotor di Indonesia telah memaksa suplier suplier lokal untuk berimprovisasi dan berinovasi dalam proses produksinya agar tetap bisa bersaing dengan kompetitor luar negeri. CV XYZ adalah sebuah perusahaan pengecoran besi yang memproduksi berbagai macam komponen otomotif. Perusahaan yang berlokasi di Kabupaten Pasuruan ini menjual hasil produksinya ke beberapa peusahaan produsen kendaraan bermotor di tanah air. Dalam upayanya meningkatkan daya saing, perusahaan ini membuat program cost reduction untuk menurunkan biaya produksinya. Salah satu upaya yang dilakukan adalah adanya usulan investasi alat puller yang dipasang di mesin core untuk menurunkan cycle time. Sebelum usulan investasi ini direalisasikan, perusahaan menginginkan dilakukan analisis kelayakan terlebih dulu. Dari hasil pengolahan data diperoleh besarnya biaya yang harus dikeluarkan oleh perusahaan untuk biaya investasi dan biaya operasional adalah Rp 16.203.923 sedangkan manfaat yang akan diterima sebesar Rp 29.547.013. NetPresent Value (NPV) nya sebesar Rp 1.416.191, Internal Rate Return (IRR) 16,08% dengan MARR yang ditetapkan perusahaan 15% sedangkan Pay BackPeriod (PBP) nya 1tahun 10,48 bulan. Dengan hasil seperti ini berarti investasi alat puller ini layak untuk direalisasikan.
OPTIMALISASI PENENTUAN BIAYA MINIMUM PADA PENGENDALIAN PERSEDIAAN BAHAN BAKU DENGAN MENGGUNAKAN METODE DYNAMIC PROGRAMMING (STUDI KASUS DI PT. XYZ) Vivin Nur Oktavianty; Tedjo Sukmono
Spektrum Industri Vol. 18 No. 1: April 2020
Publisher : Universitas Ahmad Dahlan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v18i1.10972

Abstract

PT. XYZ is a manufacturing company that produces semi-finished goods, that is imitation leather (PVC). This company has inventory problem in their production process, that is raw material shortages.  The purpose of this study was to determine the amount of calcium carbonate raw materials purchased by PT. XYZ with optimal costs. Before using this Dynamic Programming, the cost of buying raw materials is Rp. 7,345,000,000. From the results of planning the purchase of raw materials for the next 12 periods (January-December 2018) are 1184, 1185.5, 1187.1, 1188.6, 1190.1, 1191.6, 1193.2, 1194.7, 1196.2, 1197.7, 1199.3 and 1200.8 Tons. To compile a production plan by minimizing total production costs, the dynamic programming method is used with the objective function Min Fn(In) = . As a result, the total purchase cost of calcium carbonate raw material is a minimum of Rp. 7,154,355,000. After calculating the cost, it can be seen that after using the dynamic programming method the profits obtained by the company Rp. 114,472,000 compared to before using the dynamic programming method Rp. 111,040,000.
Implementation of Nawaz, Enscore, and Ham (NEH) for Minimize Makespan in Job Shop Scheduling Adistyas Nastiti, Octavia; Sukmono, Tedjo
International Journal on Orange Technologies Vol. 7 No. 2 (2025): International Journal on Orange Technologies (IJOT)
Publisher : Research Parks Publishing LLC

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31149/ijot.v7i2.5438

Abstract

OPQ is a company that specializes in providing construction materials such as ready-mix concrete, precast concrete, concrete bricks and crushed stone. With 4 different compositions and high demand, it is not uncommon for problems to occur, namely late delivery. This research aims to increase work efficiency by minimizing makespan to reduce idle time which will impact delays in product delivery to customers. The results of production scheduling using the NEH method produce smaller makespan results and faster production process completion times compared to the scheduling method used by the company. The NEH method produces a makespan of 2.29 with the job sequence P3-P4-P2-P1. The method used by the company obtained a makespan of 3.01 with a partial work sequence of P2-P3-P4-P1. This can prove that the calculation results using the NEH method can minimize makespan and this method can be used by companies as a reference for scheduling the production process to overcome the problems being faced by the company.
Tractor Paint Quality Control By Integrating The Six Sigma Method And Fail Mode And Effect Analysis (FMEA) PT. XYZ Wahyu Setiawan, Ardhi; Sulistiyowati, Wiwik; Bamban Jakaria, Ribangun; Sukmono, Tedjo
International Journal on Orange Technologies Vol. 7 No. 3 (2025): International Journal on Orange Technologies (IJOT)
Publisher : Research Parks Publishing LLC

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31149/ijot.v7i3.5439

Abstract

XYZ is a company engaged in assembling agricultural machinery, namely four-wheeled tractors. The components of the four-wheeled tractor itself consist of the front wheels, rear wheels, engine, engine cover, chassis/frame, steering floor, steering seat, fenders, pedals and roof. For parts that will be assembled, the painting process is carried out within the company itself. Therefore, during the painting process, several problems arise, namely differences in color, paint thickness and paint strength. The painting process at this company has not yet reached zero defects, because several defects were still found in the fenders, floor (steering floor), and engine cover. Situations like this can result in increased production costs and decreased product quality, which ultimately reduces profitability. The aim of this research is to find out the main factors that cause defects in painting parts and make appropriate suggestions/improvements to reduce and prevent defects in the painting process. The method used is the Six Sigma method and the FMEA (Failure Mode Effect and Analysis) method. Six Sigma in technical methods is oriented towards a statistical approach to calculating product defects. The goal is to reduce process variance by eliminating defects that interfere with customer satisfaction. FMEA is a technical analysis which, if carried out correctly and at the right time, will provide great value in helping the decision making process. The research results show that the average DPMO value for tractor product production on weekdays from January 1 2023 to April 30 2023 is 107618.46 with an average sigma value of 2.74. The recommendation for improvement from the FMEA method is that the cause of the defect with the highest RPN value is painting that does not comply with the SOP of 576. The proposed improvement for the cause of this defect is supervision of painting employees.
Ethnozoological Study of Malay Tribal Communities in Mersam Village, Batanghari District Putri, Andini Faizatul; Sukmono, Tedjo; Nugraha, Anggit Prima
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i2.8594

Abstract

Mersam Village is located in Mersam District, Batanghari Regency, and has many local wisdoms that are still preserved to this day. The Malay tribe, as the indigenous group, is the primary source of local wisdom in this village. This study aims to identify the species of animals used, describe traditional practices, outline community knowledge, and analyze the reasons why the community continues to maintain these utilization activities. The research method employed is a qualitative descriptive approach, which includes stages of preliminary surveys, interviews, participatory and non-participatory observations, and documentation. The selection of informants used purposive sampling techniques for key informants and snowball sampling techniques for general informants. Documentation and identification of samples were conducted in the field. The results of this study indicate that ethnozoology in Mersam Village utilizes 32 animals species. Ethnozoology in Mersam Village related to consumption utilizes five species, which include customary meanings and unique processing methods. Ethnozoology in Mersam Village in terms of medicine utilizes 17 species, based on hereditary knowledge through treatments provided by shamans. Ethnozoology in Mersam Village as a customary tradition utilizes five species, including practices that are only carried out in Mersam Village and must adhere to customary norms. Ethnozoology in Mersam Village as a sign or symbol utilizes 18 species, which are believed to represent good or bad omens. Additionally, there are 11 customary traditions that utilize animals.
Peramalan Permintaan dengan Menerapkan Metode Autoregressive Integrated Moving Average (ARIMA) pada Industri Beton Naufalut Tharif Qurniawan; Tedjo Sukmono
Jurnal Teknologi dan Manajemen Industri Terapan Vol. 4 No. 3 (2025): Jurnal Teknologi dan Manajemen Industri Terapan (in press)
Publisher : Yayasan Inovasi Kemajuan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55826/jtmit.v4i3.1117

Abstract

PT. Varia Usaha Beton menghadapi fluktuasi permintaan produk beton yang berdampak pada ketersediaan stok, sehingga diperlukan metode peramalan yang akurat untuk mendukung perencanaan produksi. Penelitian ini bertujuan untuk meramalkan permintaan beton masonry dengan menerapkan metode Autoregressive Integrated Moving Average (ARIMA). Data yang digunakan berupa penjualan periode Januari 2023 hingga Desember 2024, yang kemudian dianalisis melalui tahapan uji stasioneritas, identifikasi model menggunakan ACF dan PACF, estimasi parameter, serta evaluasi model berdasarkan Mean Square Error (MSE) dan uji normalitas residual. Hasil penelitian menunjukkan bahwa model ARIMA (1,0,1) merupakan model terbaik dengan nilai MSE terkecil sebesar 1,06488 dan residual yang terdistribusi normal (p-value 0,150 > 0,05). Dengan demikian, metode ARIMA (1,0,1) terbukti efektif untuk memprediksi permintaan beton masonry dan dapat digunakan sebagai dasar dalam perencanaan produksi serta pengendalian persediaan secara lebih akurat dan efisien
Analysis of Flour Inventory Control Strategy as Raw Material for Shrimp Crackers Using Markov Chain Sukmono, Tedjo; Hartanti, Lusia Permata Sari; Murnawan, Hery; Jamaluddin, Jamaluddin
Widya Teknik Vol. 24 No. 2 (2025): November
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v24i2.6132

Abstract

Abstract: One of the important challenges the industry faces is the problem of raw material inventory, so good inventory management is essential. This management results in the emergence of inventory costs comparable to the company's operational costs. Inventory deviations in an industry can be in the form of less or more inventory caused by inaccurate inventory calculations, such as those experienced by PT SLU. The condition of PT SLU shows that the products produced have decreased while raw materials have an excess inventory of more than 15,000 kg. This study aims to determine the quantity of flour raw materials to achieve optimal inventory costs at PT SLU. The method used is the Markov chain and enumeration method to determine the optimal amount of raw materials to reduce costs. The research findings indicate that policy 58 yields the lowest expected cost of Rp. 32,463,360 compared to other policies. Therefore, it is suggested that improvements be implemented, such as if the system is in states 3, 4, 5, or 6, for long-term policy. This condition can help companies create strategies to reduce overstock, particularly of raw flour materials.
Co-Authors Abdul Rohman Abdul Rohman Adistyas Nastiti, Octavia Afreni Hamidah Agung Laksono Agus Subagyo Ahmad Fikri Ardianto Alfian Fajar Gunawan Ali Mashar Ali Sadikin Ali Sadikin Amatullah, Dhiny Angela, Fitrah Cornellya Apriliana Sari Wulandari, Indah Arba, Risqi Mutia Ardiansyah Eko Saputra Arifin , Zainul Arinda Jayanti Putri Askhaarina Aulia Tsalits Asni Johari Asrial Asrial Atika, Dewi Nur Atikha Sidhi Cahyana Azhari, Asri Bambang Hariyadi Bambang Hariyadi Bambang Haryadi Benedika Ferdian Hutabarat Bestia Dewi Boy Isma Putra Damayanti , Maharani Lutfiah Damris Muhammad Dani Sartika Darlim Darmawi Dawam Suprayogi Desfaur Natalia Dewi Nurus Silmi Dian Ratna Sari Didin Muhjidin Diwanti Faradiba, Nabila Dristiana, Fila Dwi Kakung Saputro Dyah Ayu Shinta Permatasary Dzati Fauziyah Ervan Johan Wicaksana Erwin Widiantono Fahrell Andhika Pratama Fajar Ardian Cahyo Putra FEBRINA ROLIN Fila Dristiana Gusti Nurina Azhariani Hafizah, Mutia Hana Catur Wahyuni Harlis Harlis Harlis Harlis Hartanti, Lusia Permata Sari Heni Asmora Ritonga Hery Murnawan, Hery Hutwan Syarifuddin Ihsan, Mahya Indra Lesmana Inggit Marodiyah Jamaaluddin Jamaluddin Jamaluddin Kania Fatikasari Khairatinisa Khairatinisa Krisna Risky Putra Irawan Lega Anattri Leksono, Rudy Bowo Lestari, Wiwik Puji Lindyawati, Lely M. F. Rahardjo M. Rusdi M.Haris Efendi Hsb Mardhotillah, Bunga Mauli, Fajar Dwi Mishani, Adinda Chamilia Mochammad Amru Nail Suherman Mochammad Imam Mashuri Mohammad Andi Rasyid Mohammad Buchori Mohammad Ekki Hadian Much Syafiudin Muhaimin Muhaimin Muhammad Arizki Zainul Ramadhan Muhammad Dio Dwi Septian Muhammad Erick Sanjaya Muhammad Hafid Fikrianto Mukhammad Rifky Ramadhan Mukhammad Surya Lesmana Muswita Muswita Muswita Muswita Nafis Khumaidah Natalia, Desfaur Naufalut Tharif Qurniawan Naufalut Tharif Qurniawan Nazifa, Boti Iffa Nisrina Salsabila Novi Prastyanda Putra Pratama Nugraha, A. Prima Nugroho, Dizsa Arliansyah NURJIRANA NURJIRANA Nurma M. Hidayatulloh Octavia Adistyas Nastiti Octavia Adistyas Nastiti Pangestu, Retno PRADITA EKO PRASETYO UTOMO Putra, Tri Syukria Putri Ramadhani Putri, Andini Faizatul Putri, Melinda Aprilia R. Dwi Hadidjaja Rasjid Saputra Rachman, Meisya Azzahra Radiana Atika Sari Rahmansyah, Muhammad Miftah Arzaq Rany Riyantati, Dena Rasyid, Mohammad Andi Rayandra Asyhar Revis Asra Revis Asra Ribangun Bamban Jakaria Rifli Rindes Riska Afrilia Rista Dwi Cahyaningurm Rizky Janatul Magwa Rudy Bowo Leksono Safitri , Salsa Zulfa SANDI KURNIAWAN Sanjaya, Muhammad Erick Saputra, Nur Qomaruddin Sari , Indah Apriliana Sari W, Indah Apriliana Sari Wulandari, Indah Apriliana SARWO EDY WIBOWO Setiawan, Ardhi Wahyu Setiawan, Ari Rio De Sigit Wahono sisiliani, fitria trisna Sofillauny, Zahara Sonia Angellina Saputri Suhadak Sulistiono Suzanti, Sriliah Syaiful Syaiful Syaifullah, Dikril Ilham TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Tedy Azmi Nasution TEJA KASWARI Tia Wulandari TIA WULANDARI Tri Syukria Putra Ucop Haroen Upik Yelianti Utomo, Pradita Eko Prasetyo Vanisa Reyhan Faradiba Varid Jainuri Vivin Nur Oktavianty Wahono, Sigit Wahyu Nugroho Wahyu Setiawan, Ardhi Wardhani, Devira Kusuma Wawan Kurniawan Wijatmiko, Erie Fadma Noer Fitriana Wilda Syahri Winda Dwi Kartika, Winda Dwi Wiwik Sulistiyowati Wulandari, Indah Apriliana Sari Yoppie Wulanda Yusuf Effri Prastyo Budi Zurweni Zurweni