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All Journal Jurnal Teknoin J@TI (TEKNIK INDUSTRI) Jurnal Rekavasi Jurnal Optimasi Sistem Industri REKAYASA Prosiding Ilmu Pendidikan Jurnal Ilmiah Teknik Industri Proceeding SENDI_U OPERATION EXCELLENCE: Journal of Applied Industrial Engineering JOURNAL OF INDUSTRIAL AND MANUFACTURE ENGINEERING JRSI (Jurnal Rekayasa Sistem dan Industri) Wikrama Parahita : Jurnal Pengabdian Masyarakat Tekinfo | Scientific Journal of Industrial and Information Engineering PERFORMA : Media Ilmiah Teknik Industri Civil Engineering Journal Jurnal INTECH Teknik Industri Universitas Serang Raya Jurnal Ilmiah Teknik Industri Indonesian Journal of Electrical Engineering and Computer Science International Journal of Sustainable Transportation Technology Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Automotive Experiences Makara Journal of Technology Metris: Jurnal Sains dan Teknologi

Wahyudi Sutopo

Universitas Sebelas Maret

Author-ID : 397419

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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PENERAPAN POSTPONEMENT STRATEGY DALAM SUPPLY CHAIN UNTUK MENGHASILKAN PRODUK YANG MENGUTAMAKAN KEPUASAN KONSUMEN DAN MENINGKATKAN PROFIT PERUSAHAAN Dewiningrum, Ayu Purnama; Restiannisa, Kinanti; Sutopo, Wahyudi
Rekayasa Vol 5, No 1: April 2012
Publisher : Universitas Trunojoyo Madura

Salah satu hal yang menjadi sorotan dalam persaingan pasar saat ini adalah kemampuan produsen untuk menghasilkan produk sesuai dengan keinginan dan spesifikasi tertentu dari konsumen tetapi dapat diproduksi secara masal sehingga biaya produksi rendah. Perusahaan harus mampu melakukan mass customization melalui penundaaan pengerjaan diferensiasi produk pada titik akhir dalam rantai pasoknya dengan postponement strategy. Dengan menunda proses diferensiasi produk maka mata rantai produksi sebelum proses diferensiasi dapat dilakukan secara masal dan hanya proses akhir saja yang merupakan proses kustomisasi. Penerapan strategi ini dapat membantu perusahaan dalam meningkatkan level of customization, pengurangan lead time, dan menekan biaya persediaan serendah mungkin. Dengan strategi efisiensi ini, perusahaan-perusahaan dapat mewujudkan produk yang yang diminta oleh konsumen secara spesifik sehingga harga jual lebih tinggi tetapi tetap dapat menjaga biaya produksi yang rendah. Artikel ini membahas rancangan implementasi postponement strategy pada industri fashion. Pada industri tersebut, permintaan konsumen atas model dan desain adalah sangat beragam dan berubah dengan sangat cepat sehingga perusahaan yang tidak dapat mereposisi strategi produksinya tidak akan memiliki competitive advantage. Artikel ini memberikan rekomendasi awal kepada perusahaan fashion agar dapat mengadopsi dan menerapkan postponement strategy dalam supply chain pada industri fashion. Implementasi dari strategi ini diharapkan mampu mendukung industri kreatif Indonesia dalam memenangkan persaingan pasar.

Mapping of Inbound Flows in Supply Chain of Lithium-ion Industry in Indonesia Sutopo, Wahyudi; Zakaria, Roni; Wardayanti, Ari; Fahma, Fakhrina
http://dx.doi.org/10.31427/IJSTT.2018.1.1.3
Publisher : Unijourn Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

The demand for lithium battery is currently high from the consumer side due to the widespread application of lithium-ion battery for electronics (laptops, notebooks, mobile phones, street lighting) and electric vehicles (electric cars and electric motors). In Indonesia, the research and industrialization on lithium-ion battery have been conducted to develop products such as for electric vehicles and street lighting. On the other hand, the relationship between suppliers, producers, distribution channels, and consumers has not been mapped. This mapping is intended to provide an overview of the strength of suppliers, involved manufacturers, and to determine the readiness of the value chain of lithium-ion battery to perform mass production. The approach in the mapping uses primary data and secondary data for the initial stage of inbound flows in supply chain of lithium-ion industry in Indonesia. Primary data are obtained from the questionnaires, which adopted from the value chain lithium-ion battery research in USA adjusted for Indonesian context. Meanwhile, the secondary data derived from literature reviews. The respondents in the study are 11 institutions consisting of manufacturers and R&D of lithium-ion battery in Indonesia. The results obtained are supplier mapping that provides the flow of lithium-ion battery, cell, module, and pack as well as the producers and consumers. The results could also be utilized to identify the valuable metrics in the supply chain of lithium battery industry.

Supplier Selection Model of the Lithium-ion Battery using Fuzzy AHP and Analysis of BOCR Wardayanti, Ari; Zakaria, Roni; Sutopo, Wahyudi; Louhenapessy, Bendjamin
http://dx.doi.org/10.31427/IJSTT.2018.1.1.1
Publisher : Unijourn Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Although the demand for the lithium-ion battery for electronic consumers and electric vehicles in Indonesia is high, there is no supplier coming from the local manufacturer. The proper selection of suppliers is required by some lithium-ion battery manufacturers (cells, modules, and packs), and Research and Development (R&D) center of the lithium-ion battery with the consideration not only in benefits and cost but also in opportunities and risks. It is important that experts assist the manufacturers and R&D to procure the lithium-ion (materials and cells), through transparent methods that seek a quantitative model to select the right supplier. The main objective of this study is to propose an analytical approach to select suppliers which incorporate Benefits, Opportunities, Costs and Risks (BOCR) concept that comply with the characteristics of the lithium-ion battery industries. A fuzzy Analytical Hierarchy Process (AHP) model is developed by accommodating the vagueness and inaccuracies of expert elections. The result of this research is development of the model obtained from 2 questionnaires given to the expert. Questionnaire 1 was made for the determination of criteria and sub-criteria, while Questionnaire 2 aims to perform pairwise comparisons of existing criteria and sub-criteria. In the selection of the lithium-ion battery suppliers, there are 11 criteria and 40 sub-criteria which are considered. Those criteria are divided into 4 merits and known for their respective global priorities.

Analisis Pengaruh Label Halal dan Kualitas Produk Terhadap Keputusan Pembelian Produk UNSQUA Menggunakan Regresi Linier wahyudi sutopo; Frisca Pomalia; Meidiana Faras Isnafitri; Danang Miftahudin Pratama; Ayusya Khoirun Nisa; Yuniaristanto Yuniaristanto
JOURNAL OF INDUSTRIAL AND MANUFACTURE ENGINEERING Vol 4, No 2 (2020): EDISI NOVEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jime.v4i2.3579

UNSQUA merupakan produk air minum kemasan yang diproduksi oleh SPAM UNS dan dijual secara internal. Berdasarkan survey penelitian, banyak konsumen yang tidak yakin untuk mengkonsumsi produk UNSQUA karena ragu dengan kualitasnya dan tidak adanya label halal pada kemasan produk. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variabel label halal dan kualitas produk dengan menggunakan analisis regresi linier untuk mengetahui pengaruhnya terhadap keputusan pembelian UNSQUA. Hasil dari penelitian menunjukkan : variabel label halal mempengaruhi variabel keputusan pembelian sebesar 10,5% dengan signifikansi sebesar 0,58 ; variabel kualitas mempengaruhi variabel keputusan pembelian sebesar 71,7% dengan signifkansi sebesar 0,000; dan variabel label halal dan kualitas produk bersama-sama mempengaruhi keputusan pembelian sebesar 51,7% dengan signifikansi sebesar 0,000. Dengan meningkatnya keputusan pembelian maka diharapkan juga permintaan akan UNSQUA dapat meningkat dan mendatangkan profit yang lebih besar untuk perusahaan.

Optimalisasi Rute Distribusi BBM dengan Penerapan Capacitated Vehicle Routing Problem dan Excel Solver di Kabupaten Magetan Euis Nurlathifah; Fathin Kusumo Pramesti Pudjiantoro; Naufal Ammar; Wahyudi Sutopo; Yuniaristanto Yuniaristanto
Teknoin Vol. 26 No. 2 (2020)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol26.iss2.art3

Pertamina Fuel Terminal Boyolali MOR IV memiliki tugas untuk mendistribusikan produk BBM yang dihasilkan ke SPBU di Jawa Tengah dan sebagian Jawa Timur. Penelitian ini membahas pendistribusian BBM dari depot ke SPBU di Kabupaten Magetan dengan permintaan BBM sebesar 16 kl, 24 kl, dan 32 kl dengan pemilihan atau penentuan rute distribusi yang tepat sehingga memperoleh ketepatan waktu yang optimal. Tahapan penelitian yang pertama membuat formulasi model masalah capacitated vehicle routing problem (CVRP) menggunakan Excel Solver sebagai metode penyelesaiannya. Lalu tiga kriteria rute mobil tangki dengan kapasitas 16 kl, 24 kl dan 32 kl digunakan untuk menentukan distribusi BBM di Kabupaten Magetan. Hasil simulasi menggunakan software Excel Solver didapatkan rute terpendek untuk mengirimkan BBM ke 11 SPBU yang berada di Kabupaten Magetan dengan menggunakan 1 mobil tangki 24kl dan mobil tangki 32 kl. Dan didapatkan total jarak yang dilaluli oleh semua kendaraan mobil tangki adalah sejauh 2260,6 kilometer sehingga memberikan rute yang lebih baik dari rute yang ada sebelumnya yaitu sejauh 2686,2 kilometer.

Analisis Masalah Untuk Menentukan Minimasi Waste Pada Proses Produksi di PT. XYZ Fauziah Amelia Ananda; Wahyudi Sutopo
Teknoin Vol. 26 No. 2 (2020)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol26.iss2.art5

PT. XYZ merupakan salah satu perusahaan manufaktur di Indonesia yang memiliki karakteristik make-to-order dalam proses produksinya. Salah satu produk yang ada di perusahaan tersebut adalah baja slab, yang di mana baja slab ini merupakan komponen utama untuk proses produksi baja selanjutnya. Dari hasil observasi diketahui bahwa perusahaan sering tidak dapat mencapai target produksi dikarenakan adanya pemborosan dalam proses produksi yang berupa cacat dan delay, yang kemudian menambah biaya produksi. Oleh karena itu, minimalisasi waste penting untuk dilakukan. Metode yang digunakan yaitu VSM, dengan FMEA dan 5W+1H sebagai metode penunjang. Berdasarkan data yang diperoleh, ada empat waste terbesar yang menghambat efisiensi produksi baja slab, yaitu defect, overproduction, waiting, dan unnecessary motion. Dalam penelitian ini digunakan tools yaitu Process Activity Mapping, Quality Filter Mapping, dan Future Value Stream Mapping.

Adoption Intention Model of Electric Vehicle in Indonesia Martha Widhi Dela Utami; Yuniaristanto Yuniaristanto; Wahyudi Sutopo
Jurnal Optimasi Sistem Industri Vol. 19 No. 1 (2020): Published in June 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Indonesia’s government was targeting the adoption of 2.1 million units of two-wheeled electric vehicles and 2,200 units of four-wheeled electric vehicles in 2025 through the Republic of Indonesia's Presidential Regulation No. 22 in 2017 about the National Energy General Plan. In 2019, the Government of Indonesia issued Presidential Regulation No. 55 in 2019 concerning the Acceleration of the Battery Electric Vehicle Program for Road Transportation. In 2018, the adoption of two-wheeled electric vehicles only reached 0.14% of the government's target for 2025. Therefore, the adoption of Electric Motorcycle (EM) technology must also consider many factors to be successful. This research develops a non-behavioral electric vehicle adoption intention model. The factors include sociodemographic, financial, technological, and macro-level. The online survey involved 1,223 respondents. Logistic regression is used to obtain the function and probability value of intention to adopt EM in Indonesia. Frequency of sharing on social media, level of environmental awareness, purchase prices, maintenance costs, maximum speed, battery charging time, availability of charging station infrastructure at work, availability of home power based- charging infrastructure, purchase incentive policies, and charging cost discount incentive policies are significantly influencing the intention to adopt electric vehicles. It also shows that the opportunity for Indonesians to adopt electric motorcycles reaches 82.90%. The realization of the adoption of electric motorcycles in Indonesia requires infrastructure readiness and costs that can be accepted by consumers. Lastly, the results of this research provide some suggestions for the government and businesses to accelerate electric motorcycle adoption in Indonesia.

A Decision Support System to Achieve Self-Sufficiency of Soybean (Case: Central Java Province, Indonesia) Muhammad Hisjam; Nancy Octyajati; Wahyudi Sutopo; Ahad Ali
Jurnal Optimasi Sistem Industri Vol. 19 No. 2 (2020): Published in November 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Soybean self-sufficiency in Central Java Province is a problem that is difficult to realize at this time. As an important commodity, self-sufficiency becomes a serious concern for the government. Supply chain management of soybean is related to the integration of supply, demand, and distribution of soybean. The characteristics of entities involved in the soybean supply chain are complex, dynamic, and probabilistic that make the problem cannot be solved using an analytical model and it becomes too risky for trial and error. A suitable tool is using a simulation model. This paper deals with developing a Decision Support System (DSS) using a simulation model that will assist the government in adopting policies in order to achieve self-sufficiency of soybean and the improvement of farmer's welfare. DSS will help decision-makers to try various scenarios of policy in an easy way. The method was started with developing model components, then decision components, and next creating user interfaces. The simulation and system modeling is created by using Powersim software with the intent to obtain the simulation and single document interface (SDI) of the supply chain model. The result shows that land expansion policy is a top priority for realizing food self-sufficiency while increasing productivity and reducing costs of agricultural activities are the main priorities for improving the welfare of farmers.

Proposing Electric Motorcycle Adoption-Diffusion Model in Indonesia: A System Dynamics Approach Dwi Setyo Sulistyono; Yuniaristanto Yuniaristanto; Wahyudi Sutopo; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 20 No. 2 (2021): Published in November 2021
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

In 2019, the number of conventional vehicles in Indonesia reached 133,617,012 units, dominated by motorcycles of 112,771,136 units and passenger cars of 15,592,419 units. The high number of conventional motorcycle users can increase the number of pollutants and combustion emissions in the environment. This condition has encouraged the transition to a sustainable transport system that will be needed for decades to come, especially for the electric motorcycle to resolve the issue. This research aims to predict and estimate the market share of electric motorcycles by considering life cycle cost per kilometer. System dynamics simulations are developed to model the adoption-diffusion of electric motorcycles in Indonesia. This model has four main modules: an electric motorcycle module, a conventional motorcycle module, an economy module, and a consumer market module. This model shows a positive trend of EM market share from 2021-2030, with the market share value of EM is 0,411 in 2030. The development of retail price subsidy and electricity price scenarios is also carried out to determine the right policies to accelerate the adoption-diffusion process. Based on the scenario, the provision of retail price subsidy and a decrease in electricity price can increase the value of the EM Market Share.

Designing The Improvement of SPAM UNS Water Dispenser Service Quality Yosua Natalianto; Eko Pujiyanto; Wahyudi Sutopo
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.9413

SPAM (Sistem Pengolahan Air Minum or Drinking Water Treatment System) UNS was established in 2015 to meet the drinking water needs of the UNS academic community by providing 129 dispensers and water tap machines spread across buildings at UNS. A survey conducted by UNS students in 2017 showed that 54 % of students were not sure of the quality of UNS SPAM water. So the service quality questionnaire was distributed to 160 UNS students randomly and it was found that only 3 % of respondents stated that they used SPAM UNS water dispenser very often. Processing results shown the highest gap value is in the reliability dimension, with CTS namely cleanliness and flow of water. From the survey regarding the cleanliness and flow of the water carried out the DPMO value of the process was 332,589 (1, 930 sigma) . Recommendations for improvement are in the form of several SOPs to improve the cleanliness and quality of SPAM UNS water dispenser services.

Co-Authors -, Febrinata Aditya, Muhammad Hafiz Ahad Ali Ahmad Rafi Adnanta Aji, Vania Putri Anita Andria Sari Apriliana, Frisheila Sely Aqidawati, Era Febriana Aqidawati, Era Febriana Aqil, Hilmy Ardiansyah, Rakhman Arien Heryansyah Astuti, Rina Wiji Atsiila, Resia Ayusya Khoirun Nisa Azizah Aisyati Chrissandhi, Erico Sofyan Christa Dian Pratiwi Danang Miftahudin Pratama Dewi Handayani Dewiningrum, Ayu Purnama Diah Rahmanasari Didiek Sri Wiyono Diesya, Stephani Dwi Indah Maryanie Dwi Setyo Sulistyono Eko Pujiyanto Eko Supriyanto Ereika Arie Agassi Erliza, Ayu Euis Nurlathifah Evizal Abdul Kadir Fadlilah, Antika Adzary Sekar Fahma, Fakhrina Fakhrina Fahma Fakhrina Fahma Farid Ishartomo Fathin Kusumo Pramesti Pudjiantoro Fauziah Amelia Ananda Febri Muhammad Rachadian Fitri Purnamasari Frisca Pomalia Hastuti, Tiwik Tri Hisjam, Muh Hisjam, Muh. Hisjam, Muhammad Ihwan Susila Jeehad Muhammad Joshua Vicky Kristiawan, Stefanus A. Levinia Dian Laraswati, Levinia Dian Louhenapessy, Bendjamin Lsa Aldira Hafidza Mahesa Jenar Maisyaroh, Anis Marhana, Laily Martha Widhi Dela Utami Maya Revanola Zainida Meidiana Faras Isnafitri Muh. Hisjam, Muh. Muhammad Hisjam Nabilah Nabilah Nancy Octyajati Natalianto, Yosua Naufal Ammar Novitria Arie Prabarini Nugraheni, Diyah Dwi Nur Atikah Nuryanto - P., Yogie Budi Pramesti, Nidya Yutie Pramono, Wakit Prasetyo, Hoedi Pratiwi, Ayu Priyandari , Yusuf Pujiyanto, Eko Rahmatullah, Hasan Ravi Ratnasari, Sintya Renny Rochani Restiannisa, Kinanti Rinanto, Andhy Rochani, Renny Roni Zakaria Roni Zakaria Raung Shamsuddin, Siti Mariyam Silvi Istiqomah Siti Mariyam Shamsuddin Sri Listia Rosa Supriyanto, Eko Wahyu Ani Maulidiyah Wardayanti, Ari Widi Hartono Yasmine Husna Arsyifa Yosua Natalianto Yudhistira, Rasyid Yuniaristanto Yuniaristanto Zakaria, Roni Zakariya, Roni

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