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INDONESIA
J@TI (TEKNIK INDUSTRI)
Published by Universitas Diponegoro
ISSN : -     EISSN : 25021516     DOI : -
Core Subject : Engineering,
Industrial & Manufacturing Engineering
J@ti Undip: Jurnal Teknik Industri [e-ISSN 2502-1516] merupakan jurnal nasional yang mengangkat tulisan-tulisan penelitian dalam disiplin ilmu teknik industri. Pertama kali terbit sejak tahun 2006 hingga saat ini dengan frekuensi terbit tiga (3) kali dalam setahun. Setiap edisi terbitan berisi 8 artikel jurnal. Terbit setiap Januari, Mei, dan September.
Arjuna Subject : -
Articles 5 Documents
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Search results for , issue "Vol 19, No 2 (2024): Mei 2024" : 5 Documents clear
EFFECTS OF CONSUMERS’ SENSORY ATTRIBUTES ON THEIR WILLINGNESS TO PAY AND THE OPTIMUM PRICE FOR ICED COFFEE DRINKS Safira, Aretha; Masruroh, Nur Aini; Wijayanto, Titis
J@ti Undip: Jurnal Teknik Industri Vol 19, No 2 (2024): Mei 2024
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.19.2.88-95

Abstract

The growing competition among coffee shops demands effective strategies, including the development of optimal pricing. An optimal pricing strategy must account for both changes in coffee ingredients and consumers' willingness to pay (WTP). This study investigated the factors influencing consumers' WTP and determined optimal prices through sensory evaluations of iced coffee. This study explored how demographic factors and sensory characteristics affect consumer WTP. This study involved direct consumer tastings, where participants provided subjective ratings of iced coffee and indicated their WTP. The coffee samples included variations in milk (white and black coffee) and sugar content (granulated sugar, palm sugar, and no sugar). To measure WTP, the Becker-DeGroot-Marschak (BDM) mechanism was employed, while a demand function was used to determine the optimal price. Stepwise backward logistic regression further analyzed the factors affecting WTP. The factors influencing willingness to pay were further analyzed using stepwise backward logistic regression. The findings reveal that optimal pricing varies, with iced coffee that includes both granulated sugar and milk commanding the highest WTP. Consumer WTP is significantly influenced by factors such as gender, frequency of coffee consumption, and individual taste preferences. There was a marked difference in WTP based on the amount of milk and sugar added, with coffee variations containing both granulated sugar and milk achieving the highest WTP. These results can serve as a valuable reference for coffee shops, helping them to determine the ideal product composition and pricing strategies to maximize revenue.
ANALYSIS OF FACTORS AFFECTING THE INTENTION TO PURCHASE ELECTRIC VEHICLES: A SYSTEMATIC LITERATURE REVIEW (SLR) Putri, Riri Ramadhani
J@ti Undip: Jurnal Teknik Industri Vol 19, No 2 (2024): Mei 2024
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.19.2.96-107

Abstract

Electric vehicles are a type of vehicle that is driven by an electric motor powered by a battery. Electric vehicles are gaining popularity worldwide due to increasing environmental awareness and various benefits such as reduced dependence on fossil fuels and being considered an efficient and sustainable mode of transportation. This research presents a comprehensive overview and bibliometric analysis of published studies related to consumer adoption/purchase intentions of electric vehicles (EVs) from 2014 to 2024. The Scopus database was used to extract the papers as it is considered the largest database of peer-reviewed academic publications colleagues. VOS Viewer software was used for bibliometric analysis of networks between authors, institutions, countries, publications, journals, and keyword occurrences. The research was conducted on March 23, 2024, which resulted in a total of 154 documents after exclusion using selected keywords. These findings show a sizable increase in publications regarding intentions to adopt electric vehicles over the past six years. China is the world leader in this research field, providing the maximum number of papers. Sustainability Switzerland Journal stands out as the most productive journal with the most publications. This analysis will help academics better understand historical trends, current challenges, and future research topics in the area of electric vehicle adoption/purchase intentions.
OPTIMASI PERENCANAAN PRODUKSI AGREGAT PRODUK TUNGGAL DENGAN MEMPERTIMBANGKAN KAPASITAS PRODUKSI Prastiya, Denny Suci; Wahyuni, Rossi Septy
J@ti Undip: Jurnal Teknik Industri Vol 19, No 2 (2024): Mei 2024
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.19.2.58-69

Abstract

Pertumbuhan pada industri air minum dalam kemasan mengalami peningkatan secara signifikan. Peningkatan pada industri air minum dalam kemasan dipengaruhi oleh tingginya permintaan akan produk air minum bersih. PT X pada studi kasus ini mengalami fluktuasi permintaan yang diakibatkan tingginya persaingan antara industri sejenis. Oleh karena itu PT X pada studi kasus ini menjalin kerja sama subkontrak dalam memenuhi permintaan. Permasalahan yang dialami oleh PT X adalah meningkatnya harga per unit saat melakukan subkontrak. Tingginya harga unit subkontrak dapat mengakibatkan tingginya biaya perencanaan produksi. Penelitian ini dilakukan untuk meminimasi jumlah unit subkontrak dengan mengoptimalkan produksi internal. Model optimasi dibangun dengan fungsi tujuan linear dan fungsi pembatas non linear sebagai usulan optimasi perencanaan produksi agregat. Di samping itu, berkurangnya jumlah unit subkontrak dapat mengakibatkan tingginya produksi internal perusahaan, sehingga model usulan perlu mempertimbangkan kapasitas produksi. Usulan evaluasi kapasitas dilakukan menggunakan pendekatan rough-cut capacity planning. Berdasarkan hasil optimasi model usulan dapat menghemat biaya perencanaan produksi agregat sebesar 5% dibandingkan dengan kondisi nyata. Abstract[Optimization of Single Product Aggregrate Production Planning Considering Production Capacity] Bottled drinking water industry growth has increased significantly. The increase in the bottled drinking water industry is influenced by the high demand for clean drinking water products. PT X in this case study experienced fluctuations in demand due to high competition between similar industries. Therefore, PT X established sub-contract cooperation to fulfill demand in this case study. The problem experienced by PT X was when carrying out sub-contract cooperation. The high price per unit of sub-contracted products can result in high production planning cost. The research is conducted to minimize the number of sub-contract units while optimizing internal production. The optimization model was built with a linear objective function and a nonlinear constraint function as an optimization proposal for aggregrate production planning. Besides that, the reduced number of sub-contract units can result in high internal production for the company, therefore it is necessary to consider production capacity. The proposed capacity evaluation is conducted using a rough-cut capacity planning approach. Based on the results of the optimization of the proposed model, it can save 5% of aggregrate production planning costs compared to actual conditions.Keywords: integer nonlinear programming; production capacity; aggregrate production planning
DESIGNING AN E-KANBAN SYSTEM TO IMPROVE DRUG AVAILABILITY AND MINIMISE INVENTORY WASTE AT THE HOSPITAL PHARMACY INSTALLATION Sriyanto, Sriyanto; Dyah Ika, Rinawati
J@ti Undip: Jurnal Teknik Industri Vol 19, No 2 (2024): Mei 2024
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.19.2.70-73

Abstract

In an effort to provide a high level of service to hospitals, pharmaceutical installations are often faced with problems in monitoring and determining adequate drug supply levels to respond to demand, both from outpatient and inpatient units. Inventory control by hospital pharmacies is often carried out without being supported by accurate information systems or control methods, resulting in excess inventory levels which leads to higher inventory costs. This study aims to identify and develop an e-kanban system suitable for the scope of hospital pharmacy. E-kanban as a method of controlling inventory through a simple reliable information system is expected to minimize inventory waste that occurs. The e-kanban system coupled with the use of barcodes and portable scanners is expected to provide more accurate information on drug availability. Inventory monitoring and control is expected to be much easier, both at the time of replenishment and during periodic stock-taking. The implementation of the e-kanban system is also able to eliminate waste, card use and manual recording activities, replaced by the use of simpler two-bin containers. The e-kanban system can also be integrated into the existing Hospital Information System, without disrupting the running system.
PERANCANGAN ALAT BANTU PEMANENAN ERGONOMIS UNTUK MENGURANGI RISIKO MSDS BAGI PETANI SAYUR DI KABUPATEN BANDUNG BARAT Theresia, Clara; Arrissa, Febbyuli; Yogasara, Thedy
J@ti Undip: Jurnal Teknik Industri Vol 19, No 2 (2024): Mei 2024
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.19.2.74-87

Abstract

Aktivitas pertanian di Indonesia sebagian besar masih dikerjakan tanpa alat bantu, sehingga memperlambat produktivitas serta memicu risiko musculoskeletal disorders (MSDs). Penelitian ini bertujuan untuk merancang alat bantu pemanenan sayuran bagi petani di daerah Kabupaten Bandung Barat. Penelitian diawali dengan identifikasi keluhan tubuh melalui Survei Keluhan Otot dari Perhimpunan Ergonomi Indonesia (PEI) dan Kuesioner Gangguan Otot Rangka (GOTRAK) dari Badan Standardisasi Nasional. Perancangan produk dilakukan menggunakan pendekatan berbasis pengguna atau User Centered Design (UCD) dengan identifikasi kebutuhan melalui wawancara dan observasi. Kemudian, dilakukan pengembangan alternatif konsep rancangan melalui design workshop dan pemilihan konsep terbaik melalui concept scoring yang difinalisasikan melalui SCAMPER. Rancangan final diwujudkan menjadi prototipe fisik dan dievaluasi melalui usability testing. Aktivitas yang diamati adalah pemanenan sayur selada dengan skor keluhan sebesar 14 (berbahaya). Tahapan penelitian dimulai dengan melakukan identifikasi kebutuhan yang menghasilkan 9 pernyataan kebutuhan. Kemudian, dilakukan design workshop berdasarkan daftar kebutuhan yang menghasilkan 3 alternatif konsep. Terpilih 1 konsep dengan skor 3,838 dan difinalisasikan menjadi 2 produk, yaitu alat untuk memanen selada dan wadah untuk mengeringkannya. Prototipe alat panen selada diuji coba pada petani secara langsung dan diperoleh skor GOTRAK menjadi 2 (kategori aman) dengan skor rata-rata efektivitas sebesar 92,86%. Dengan demikian, rancangan alat bantu telah dinilai baik karena sudah mampu mengurangi keluhan MSDs petani dari nilai kategori berbahaya menjadi. Abstract [Design of Ergonomic Harvesting Tools To Reduce MSDs Risk For Vegetable Farmers In West Bandung District] Agricultural activities in Indonesia are still done without assistive tools, causing slower productivity and triggering the risk of musculoskeletal disorders (MSDs). This study aims to design assistive tools for one of the agricultural sectors, that’s vegetable farmers in Bandung Barat Regency. The study began with identification of body complaints using Muscle Disorders Survey from the Perhimpunan Ergonomi Indonesia (PEI) and the Skeletal Muscle Disorder Questionnaire (GOTRAK) from the Badan Standardisasi Nasional. The design process used User Centered Design (UCD) while needs identification used interviews and observations. Then, the development of alternative concepts was gained through design workshops. From this, the best concepts are selected through concept scoring and finalized through SCAMPER. The final design is implemented into a physical prototype and evaluated through usability testing. The activity observed was lettuce harvesting with a complaint score of 14 (dangerous). The research stage began with identifying needs which resulted in 9 needs statements. Then, a design workshop was conducted based on the list of needs that resulted in 3 alternative concepts. One concept was selected with a score of 3,838 and finalized into 2 products, the first harvesting tool to pull out lettuce and a container to dry it. The prototype was tested directly on farmers, the GOTRAK survey results obtained a score of 2 (safe category) with an average product effectiveness score of 92.86%. In conclusion, the tool design is considered good because it could reduce MSDs complaints from the dangerous category to safe..Keywords: Ergonomics; Gotrak Questionnaire; Farmers; MSDs; UCD

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