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OPSI
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 16932102     EISSN : 26862352     DOI : https://doi.org/10.31315/opsi
Core Subject : Engineering,
Industrial & Manufacturing Engineering
Jurnal OPSI adalah Jurnal Optimasi Sistem Industri yang diterbitkan oleh Jurusan Teknik Industri UPN “Veteran” Yogyakarta sebagai wahana publikasi hasil karya ilmiah, penelitian rekayasa teknologi di bidang Teknik Industri, Sistem Industri, Manajemen Industri dan Teknologi Informasi.
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Articles 255 Documents
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Cover, Preface, Editorial Board, and Table of Contents Opsi Vol 16 No 2 December 2023 Cover, Cover Daftar
OPSI Vol 16 No 2 (2023): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v16i2.11679

Abstract

Performance evaluation of Indonesia's large and medium-sized industries using Data Envelopment Analysis method Putri, Erni Puspanantasari; Aduldaecha, Sukon; Putra, Bonifacius Raditya Sri Pramana; Puteri, Agatha Hannabel Avnanta
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.11785

Abstract

Performance evaluation is essential for an industry's ability to operate successfully. Efficiency management is becoming crucial and important to enhancing the sustainability of the industry. The industry needs to measure its performance for the following reasons: (i) develop the economy and its operation efficiency in a sustainable way; (ii) supply data for decision-making units (DMUs); and (iii) optimize output using the fewest resources. Performance measurement indicators relate to the performance of the industry itself, such as: added value/cost of production factors, indirect taxes, number of workers, input costs, number of companies, added value/market prices, and production index. The purpose of this research is to measure the performance of large and medium-sized industries (LMIs) in Indonesia. LMIs have a strategic role as the main engine and driver of the economy. Measuring LMI performance is very necessary so that LMI can grow and develop sustainably. Data envelopment analysis (DEA) is a method for measuring performance. DEA is a non-parametric linear programming technique and used to determine comparisons between DMUs with different inputs and outputs. The research results indicate that there are three DMU classification categories, namely: Category 1 (ES = 1), Category 2 (ES = 0.9986-0.9998), and Category 3 (ES = 0.9971-0.9974). The percentages for each category are 50%, 37.5%, and 12.5%.
Development of palm pool brondonal pick up tools to increase time efficiency by VDI 2221 method Lucitasari, Dyah Rachmawati; Ramadhani, Fidah Jihad
OPSI Vol 17 No 2 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i2.11793

Abstract

Koperasi Unit Desa (KUD) aims to improve the welfare of members by carrying out harvesting process activities in Lubuk Kembang Sari, Riau. The problem that often occurs is collecting oil palm fruit which is still done manually by bending or squatting. Previously there was a manual tool which had shortcomings in the form of the design of the chute section which was still less than optimal in the trajectory of throwing the brochures into the container, sometimes the brochures were thrown upwards instead of backwards into the reservoir. Another drawback is that when carrying tools if the distance is quite far then this process is a little difficult. The aim of this research is to develop a loose picker tool from existing design references to increase time efficiency.The development of tools for picking up palm oil loose ends was carried out using the VDI (Verein Deuscher Ingenieure) 2221 method. Development using this method began with analyzing the shortcomings of existing tools and developing farmers' desires and needs for the specifications of new oil palm loose picking tools. After the design concept is created, the next step is to create a customized design using the user's body anthropometry, and the final step is to carry out trials on the palm oil harvester picking tool.This research resulted in a new palm oil harvester tool that is capable of picking up palm oil stalks. The comparison between manual collection and the new tool is that the new tool can speed up the collection time by 28%. A time comparison was also made using the old tool with the new tool, it turns out that the new tool can speed up the time by 54%. Based on user satisfaction tests, the tool is easy for users to operate and is automatic.Keywords: Palm oil fruit, manual tools, time efficiency, VDI 2221
Enhancing customer satisfaction towards the service quality of Soekarno-Hatta International Airport using servqual and binary logistic regression Graciela, Felice; Satitidjati Dewayana, Triwulandari; Habyba, Anik Nur
OPSI Vol 17 No 2 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i2.11930

Abstract

The world is experiencing rapid change, leading to transformations in human lifestyles that necessitate adaptation. However, the aviation industry appears to have reached a point of stagnation. Soekarno-Hatta International Airport must adapt to the new needs and demands of passengers by implementing necessary changes and incorporating the latest available technologies. To gain a deeper understanding of passenger satisfaction regarding the service quality at Soekarno-Hatta International Airport, the SERVQUAL method and Binary Logistic Regression Analysis will be employed. Both methods aim to identify services that has significant impact and determine the relative influence of these services on the overall service quality at Soekarno-Hatta International Airport. The results of the SERVQUAL method in this study indicate that there are 14 services at Soekarno-Hatta International Airport that do not meet passenger satisfaction standards, with a need for particular attention to the reliability dimension. Subsequently, the Binary Logistic Regression analysis results indicate that only parking price and ambiance significantly influence passenger satisfaction, with the likelihood of increasing satisfaction being 1.7732783 and 2.0773711 times respectively. Focus should be placed on improving operational accuracy through stringent Standard Operating Procedures (SOPs) and comprehensive staff training, reducing supplementary expenses like toll charges, expanding parking facilities, and optimizing parking flow, improving illumination, customer engagement, and noise control measures. 
Critical factors of green supply chain management on SMEs business performance Indonesia Dewa, Parama Kartika
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.11931

Abstract

The COVID-19 pandemic has altered lifestyle and sparked a greater interest in GSCM. This study logically contributes to the branch of knowledge by demonstrating how resource-based attributes and integration can improve SME business performance while concurrently facilitating the successful transition from traditional to green supply chains. This study focused on batik SMEs that make their products using natural resources. The goal is to analyze SME performance models that affect GSCM, owner commitment, and supply chain connectivity. The data analyzed were gathered from a total of 163 experienced SME managers in the Special Region of Yogyakarta, Indonesia. PLS-SEM is the data analysis method used. The results validate that SME business performance is positively impacted by OC, SCC, and GSCM. The function of OC and SCC in SME business performance can also be mediated by GSCM.
The implementation of Occupational Health and Safety (OHS) program on employee working conditions in the harvesting unit of PT Sewangi Sejati Luhur Ferhat, Amallia; Nurdiansyah, Bayu; Suswatiningsih, Tri Endar; Bimantio, Mohammad Prasanto
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.11997

Abstract

PT. Sewangi Sejati Luhur, a palm oil plantation company, manages 7,000 hectares divided into 12 divisions across 3 estates. The company primarily focuses on cultivating and processing Fresh Fruit Bunches (FFB), with the harvesting unit employing the most workers. This research aims to investigate the implementation of the Occupational Health and Safety (OHS) program within the harvesting unit at PT Sewangi Sejati Luhur, designed to prevent work accidents and occupational diseases. Conducted in Tapung Hulu Subdistrict, Kampar Regency, Riau Province, the study employs a quantitative descriptive method using the HIRARC method to assess OHS application and employee working conditions. A saturated sample of 30 harvesting employees was surveyed through interviews and documentation of the OHS program. The findings reveal that the OHS program includes periodic health exams, OHS awareness campaigns, monthly activities, and training sessions. The program's implementation has led to low accident rates and satisfactory achievement of goals. Correlation analysis shows a significant link between OHS program implementation and improved employee working conditions. Additionally, 82% of respondents reported that the OHS program significantly influenced their working conditions, while 18% cited other factors. Overall, the OHS program in PT Sewangi Sejati Luhur's harvesting unit has been effective, ensuring a low accident rate and meeting monthly targets.
Optimizing product design and development of engine carbon cleaning maintenance tools using reverse engineering and VDI 2222 methods Wijaya, Dewa Kusuma; Hartono, B.J Ridwan; Jazuli, Jazuli; Izzhati, Dwi Nurul
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12032

Abstract

This research article explains the product design and development optimization of multi feature engine carbon cleaning maintenance tools. The implementation of the Reverse Engineering method was integrated with VDI 2222 in the research process. The results of the optimal design and development of this tool obtained a component structure that was able to meet 14 types of consumer needs with a total tool cost of IDR 1.137.900 with a total tool weight of 6.9 kg. The results of the load test simulation concluded that the housing case was able to withstand the overall weight of the components that make up the tool. Depending on the liquid chemical used, the results of tool tests on a limited scale have proven to be able in save fuel consumption by ±12.5% per hour with engine workload which can also be reduced by 3,14%.
Management of battery waste recycling by electric motorbike workshops: A literature review Purwani, Annie; Budijati, Siti Mahsanah; Asih, Hayati Mukti
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12173

Abstract

Battery waste needs to be managed immediately and thus electric vehicles (EVs) become more popular as a sustainable replacement for internal combustion engine vehicles. This review discusses waste battery recycling industry practices and emphasizes the need for authorized battery management services for electric motorcycles. This gap allows third-party businesses not affiliated with the primary manufacturer to emerge and potentially grow sustainably. The literature review methodology involves an in-depth search of relevant literature using the Scopus database with strategically selected keywords. The VoS Viewer collects, organizes, and graphically maps references to synthesize them orderly. The search initially yielded 138 relevant articles. This number was then narrowed to 66 articles published in English journals. Thirty-nine articles were found when the search was modified to focus on full-text availability. These findings indicate an important need for more targeted research to design effective management frameworks for recycling waste batteries in electric motorbike workshops. All critical components increased waste management awareness and expertise among workshop managers, government policies, funding support, and a well-coordinated supply chain. This assessment identifies barriers to developing a viable battery waste recycling sector and makes recommendations for future policy and research initiatives.
The organic waste management supply chain performance evaluation strategy uses an Interpretive Structural Modeling approach Arsiwi, Pramudi; Setyaningrum, Ratih; Talitha, Tita; Ramdhani, Safarudin
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12242

Abstract

National Waste Management Information System shows that the amount of waste handled in Semarang City over the last three years has decreased with an average decline index of 1.06% per year. This is reinforced by the results of interviews with the Semarang City Environmental Service, that the handling of organic waste is still very limited because so far the handling has been more focused on an-organic waste. Therefore, it is necessary to evaluate supply chain performance to determine the constraints in organic waste management from upstream to downstream. Based on the research results using the Interpretive Structural Modeling (ISM) method through a focus group discussion process involving eight experts in the field of waste management, it is known that the supply chain performance for handling organic waste in Semarang City has 11 elements of constraints, which are divided into seven priority levels. The element with the highest priority is related to the availability of organic waste supplies, while the element with the lowest priority is technological innovation and the application of appropriate technology. Improving the performance of organic waste management supply chains should focus on elements according to priority.
Improving the job shop scheduling algorithm to minimize total penalty costs considering maintenance activity Puryani, Puryani; Chalida, Nurmalia; Soepardi, Apriani; Chaeron, Mochammad; Nafisah, Laila
OPSI Vol 17 No 2 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i2.12291

Abstract

Production scheduling is generally based on the assumption that resources are always available. In reality, these resources, machines, and supporting facilities experience limited availability due to interruptions during the production process. Therefore, to improve these conditions, the maintenance process conducted to reduce the disruption level of the machine needs to be scheduled as part of the available for job processing leading to penalty costs, such as tardiness and earliness. This research aims to develop a new algorithm to solve job shop scheduling problems to minimize the total penalty cost by considering machine unavailability due to scheduled maintenance activities. The proposed model modifies the existing model using a combination of priority rules and a heuristic approach algorithm known as priority dispatching. The result showed that the proposed model produces a greater total cost with a larger flow time than the previous model. Although the flow time is larger, it is more realistic according to real conditions because the proposed model considers machine maintenance activities. Furthermore, the combination of priority rules used also affected the flow time and the total penalty costs incurred, which can be minimized through several alternatives.

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