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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.
Arjuna Subject : -
Articles 255 Documents
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Utilizing the game design factor questionnaire to develop engaging games for adaptive learning in the serious educational game: the Ma'had Sari, Nur Fitriyah Ayu Tunjung; Kusumawati, Ririen; Karami, Ahmad Fahmi; A, Miftahul Hikmah Putri Samudera
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.v17i1.11322

Abstract

This study explores the unique mandatory residence, Ma'had Sunan Ampel Al Alyi (MSAA), at the State Islamic University (UIN) Maulana Malik Ibrahim Malang, aiming to develop Quranic reading competence in new students. The varying educational backgrounds of admitted students lead to differences in their Quranic reading capabilities, highlighting the need for adaptive learning. In response to this diversity, adaptive learning using artificial intelligence is employed, implemented through the serious education game "The Ma'had." Survey results from expert individuals using a Game Design Factor Questionnaire reveal the game's substantial potential. The results show high agreement (100%) on clear goals, engaging gameplay, and a sense of freedom, with 67% strongly agreeing on improved understanding. Challenges are motivating, and the game successfully sparks curiosity. "The Ma’had" Game proves effective, but further research is recommended to explore variations in player engagement and compare results with expert test subjects, employing alternative quantitative testing methods for a comprehensive analysis.
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.
Keputusan Pemilihan Formula Sabun Menggunakan Analytical Hierarchy Process Purwani, Annie; Astuti, Amalia Yuli; Wahyuningsih, Titi; Ghozali, Muhammad Nizar
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.v16i2.9766

Abstract

Waste cooking oil is one of household waste. Waste cooking oil is usually disposed to the sewers or gardens. Utilization of waste cooking oil is by recycling it into a solid soap product. The production of solid soap from waste cooking oil is a solution to reduce waste. There are various formulas for making soap products from waste cooking oil. In order to utilize waste cooking oil becomes maximal dan useful, it is necessary to select the best formula for further development. The research begins by identifying the soap formula with a simple process. The identification results obtained six soap formulas that can be produced on a household scale. The six soap formulas were then produced and tested according to Indonesia’s national standards (SNI). The method used to select the best formula was Analytical Hierarchy Process (AHP), which involved four partisipants as experts. The result of the decision of the best soap formula is Soap 6. Meanwhile, the three priority attributes for decision-making are soap standard (SNI), cleaning power, and the ability to hold bacteria.
Facility layout design of bag and apparel factory with systematic layout planning and computerized relative allocation of facilities technique method Fitrian, Alvin Noor; Lestari, Dwi
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.v17i1.11343

Abstract

The high market attractiveness index and competitive position made Dewi Media Lestari invest in building a new factory. The factory specifically is used to produce convection products and apparel. Development is carried out using a systematic layout planning and computerized relative allocation of facilities technique. The objective of this research is to obtain an ideal layout that can minimize the distance between departments. As a result, there are nine departments with a total area of 385 m2 consisting of 18 m2loading dock department, 36 m2 raw material department, 86 m2cutting department, 42 m2 branding department, 21 m2 screen printing department, 105 m2 sewing department, 28 m2 finishing department, 28 m2 packing department, and 21 m2 warehouse department. Material handling costs for the initial layout produced using the systematic layout planning method are IDR 29,808.95 per day. After adjusting with Computerized Relative Facility Allocation Technique, the most ideal final layout was produced with minimal material handling costs of IDR 24,411.40 per day.
Workload analysis to determine the optimal number of workforce using the Work Load Analysis (WLA) method at PT. Harapan Jaya Multi Bisnis Ahmad, Arfandi; Herdianzah, Yan; Safutra, Nur Ihwan; Rauf, Nurhayati; Gamgulu, Rifki; Nur, Taufik
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.v16i2.8967

Abstract

Workload is something that arises due to excessive activity demands. The workload is not proportional to the number of available workers because of the high target of pipe production while the number of workers is lacking so that human resources cannot work productively, especially in the production department at PT. Harapan Jaya Multi Bisnis. The purpose of this study is to determine the workload of employees in pipe production and determine the optimal number of workers. This study uses the Work Load Analysis (WLA) method to analyze the workload in determining the optimal number of workers. The results of this study after calculating the workload, it is proposed that the fixed cutting section is 2 people with a workload of 62.65%. In Branding, in real terms there is 1 person with a total workload of 11.73% and an average workload of 11.73%. After calculating the workload, it is proposed that the shooting section still be 1 person with a workload of 11.73%, because if additional workers are added, the workload will be too low. The time needed to complete the activity is 7 hours per day. After calculating the workload, Quality Control is proposed to be 1 person, because if additional workers are added, the workload will be too low, namely 7 hours per day.
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.
Selection of pilot and flight attendant uniform suppliers in a private airline holding company using the Analytic Hierarchy Process (AHP) method Wahyuni, Rossi Septy; Zaen , Miftakhul; Nursubiyantoro, Eko; Raharja, Mei; Zulkarnain , Yahya
OPSI Vol 18 No 1 (2025): OPSI - June 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i1.11505

Abstract

The selection and assessment process of suppliers carried out by Private Airline Holding Company uses subjective assessment. It is not so transparent from the department's head with five criteria of suppliers and just enough sub-criteria. This matter inflicted a few problems, such as the goods received from suppliers not being by the amount ordered, the established quality standards, delays in estimated time delivered and received, and defects often found in the goods. Analytical Hierarchy Process (AHP) is a method that helps solve complex problems by structuring a hierarchy of criteria, stakeholders, and outcomes and by considering many things to develop values or priorities. This research aims to determine the priority criteria and sub-criteria of pilot and flight attendant uniform suppliers and the priority order of the best suppliers, Private Airline Holding Company. This research uses Expert Choice V.11 software to implement the AHP method. The overall evaluation obtained shows that five criteria and thirteen sub-criteria were used. The best supplier based on data processing is Supplier 1, with a value of 0.213.
Proposed improvement of product support packaging material defects using the Cross-Industry Standard Process for Data Mining (CRISP-DM) approach Fitriana, Rina; Habyba, Anik Nur; Nabiha, Gina Almas; Mareta, Sannia
OPSI Vol 18 No 1 (2025): OPSI - June 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i1.11803

Abstract

This research was conducted because the defect rate of packaging materials supporting lithos M products exceeded the Company's tolerance standard of 2%. This research aims to identify the causes and provide suggestions to improve the Quality of product support packaging materials. The methods used in data mining with the CRISP-DM (Cross-Industry Standard Process For Data Mining) approach. The Business Understanding stage determines the problem and research objectives, Power Business Intelligence, SIPOC (Supplier, Input, Process, Output, Customer) Diagrams, Operation Process Chart, QC Action, and CTQ (Critical to Quality). The Data Understanding stage creates a Control P Chart, calculates DPMO and the sigma level obtained by the unscramble machine dented bottle value 762.31 with a Sigma level of 4.66, Sticker 2nd defect Internal 187.47 with a sigma level of 5.06, Cap 2nd defect internal 67.18 with a sigma level of 5.32, and uses Fault Tree Analysis. The Data Preparation stage performs data cleaning, integration, transformation, and preprocessing. The Modelling stage makes classification with C4.5 and the Cart decision tree algorithm. The evaluation stage uses a Confusion Matrix accuracy of 78.8 percent and 89.4 percent, respectively. The Deployment stage produces improvement proposals by creating a Dashboard, Standard Operating Procedure, and Check Sheet.  
Evaluating music teacher performance through 360-Degree Feedback: A study in a music education institution Dewi, Amelia Miranti; Satitidjati Dewayana, Triwulandari; Suhardini, Didien
OPSI Vol 18 No 1 (2025): OPSI - June 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i1.11933

Abstract

Yayasan Pendidikan Musik Music School in Jakarta has been operating for years without a performance measurement system for its employees, which makes it difficult to improve service quality and efficiency, as well as the effectiveness of the activities carried out. This study aims to design and implement a performance measurement system for music teachers using the 360-degree feedback method. This method is used to provide an objective and comprehensive assessment of performance. Performance criteria are evaluated through a literature review that is tailored to the duties, responsibilities, and job descriptions of the teachers, and then weighted using Pairwise Comparison. The performance measurement tool is implemented in the evaluation of three teachers, assessed by superiors, colleagues, students or parents, and themselves. The assessment results are then analyzed to identify areas for improvement. The results of this study show that all teachers received an average final score of 4, indicating good performance.
Optimization of production layout, production process, and supply of materials to increase work productivity in Saramanta homemade Setyaningrum, Ratih; Erthamevia, Firlinda Kirana; Febriana, Sofi Dwi; Setyanti, Ananda Viona Islamay
OPSI Vol 18 No 1 (2025): OPSI - June 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i1.12190

Abstract

Saramanta Homemade located in Boja, Kendal is an MSME that produces various cakes. In its production, Saramanta Homemade experiences several obstacles, namely: less than optimal layout; work is done without a work desk, which affects worker he alth and reduces productivity; and decreased profits due to increased costs due to the supply of raw materials. In previous studies, productivity optimization was only focused on layout planning, while this study discusses measuring supply chain performance to increase profits and product design to implementation of designed products. Therefore, researchers use the EFD, SLP, and SCOR methods to solve these problems. The EFD method is used to design an ergonomic work desk with dimensions l = 1610mm, w = 710mm, and h = 1020mm so that it can reduce musculoskeletal complaints as evidenced by a RULA value of 2. The SLP method is used for changing positions between departments, shortening the moving distance by 71%, the total moving time by 50%, and OMH by 47% so that the layout can be optimized through the proposed layout design using Blocplan software. SCM performance measurement with SCOR of 63.83% (average). As well as alternative proposals for selecting suppliers from Semarang, shipping costs of Rp50,000, Emina cheese brand of Rp45,000/kg, and the addition of 4 workers so that expenses are reduced by 5.8%, profits increase by 58.1%, and cash-to-cash cycle time becomes 31% shorter.

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