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OPERATION EXCELLENCE: Journal of Applied Industrial Engineering
Published by Universitas Mercu Buana
ISSN : 2085429     EISSN : 26545799     DOI : 10.22441/oe
Core Subject : Science,
Decision Sciences, Operations Research & Management
The aim of Operations Excellence: Journal of Applied Industrial Engineering (OE Journal) is to publish theoretical and empirical articles that are aimed to contrast and extend existing theories, and build new theories that contribute to advance our understanding of phenomena related with industrial engineering and industrial management in organizations, from the perspectives of Quality Engineering, Productivity Improvement, Logistic & Distribution, Supply Chain Management, Performance Management & Improvement System, Modelling, Operations Management, Optimization, Green Manufacturing.
Arjuna Subject : -
Articles 317 Documents
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Peran Technopreneurs dalam Komersialiasi Teknologi Konverter Kit Motor Listrik (Studi Kasus: PT. EKM) Muhammad Iqbal Sulistyo Putra; Wafiq Hasan Al Banna; Sayyidah Maulidatul Afraah; Yuniaristanto Yuniaristanto; Eko Liquiddanu; Wahyudi Sutopo
Operations Excellence: Journal of Applied Industrial Engineering Vol. 14, No. 3, (2022): OE NOVEMBER 2022
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2022.v14.i3.057

Abstract

Most of the technology from universities (PT) related to technological innovation often fails to enter the market. This problem then becomes the basis and object of improvement in technology-based entrepreneurial practices (technopreneurs). Learning is carried out through Independence Learning Campus Independence (MBKM) which converts courses according to training subjects in collaboration with PUI UNS and BPPT. This practice is a model of participatory and collaborative learning, in which students are directly involved in solving existing case studies and act as perpetrators of technology commercialization and become technopreneurs. Students are initially given training materials in accordance with the curriculum and direct learning from existing tenants. As a result, through this learning process, students can design business process proposals that exist in tenants. The success of this learning method was assessed based on technopreneur analysis from students in answering problems faced by tenants based on aspects of product technology innovation, product development, business development, and its implementation at BMC. One of the tenants who is the object of the case study in this study is the start-up PT. EKM who have problems with the commercialization of technology in the case of konverter kit products.
Analysis on The Mental Workload of Female Lecturers During The Covid-19 Pandemic Euis Nina Saparina Yuliani; Sri Suhartini; Daisy Ade Riany; Defi Norita; Hernadewita Hernadewita; Emi Pahiba
Operations Excellence: Journal of Applied Industrial Engineering Vol. 14, No. 2, (2022): OE JULY 2022
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2022.v14.i2.049

Abstract

The coronavirus (Covid-19) pandemic continues to create significant effect than initially predicted. In addition, the virus spread showed rapid increment, since March 2020, leading to several impacts on human lives, e.g., education. Furthermore, various government policies, including social distance greatly influences teaching and learning activities, both in high schools and universities. As a consequence, conventional face-to-face learning model was temporarily suspended. This implies the need to engage online education. Prior to the outbreak, the mental workload of lecturers was relatively intense, comprising the three basic pillars of higher education (Tridharma), termed education, research and community service, as well as other additional tasks, including final year project supervisions and hold structural position. During the pandemic, mental workload considerably increased considerably as most lecturers, particularly the females also served as home teachers. Therefore the purpose of this research is to analyze the mental workload of female lecturers during the Covid-19 pandemic in Indonesia. Questionaire is used to measure mental workload taken from the National Aeronautics and Space Administration-Task-Load Index (NASA-TLX). Furthermore, the survey is applied to evaluate job demands. The results showed that teaching, research and housewive role influence the mental workload as an aspect with the maximum score. In comparison, a maximum score of 29% on the mental demand aspect generates a physical demand aspect of 27%.
Analisis Peningkatan Efektifitas Mesin Cetak Produksi Tangki Air Dengan Metode Overall Equipment Effectiveness Yulia Laysa
Operations Excellence: Journal of Applied Industrial Engineering Vol. 14, No. 3, (2022): OE NOVEMBER 2022
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2022.v14.i3.064

Abstract

The increase in customer demand for water tanks has resulted in companies having problems meeting all requests. This is mainly due to the high machine breakdown time, especially on Line 3 No 28 printing press. The company strives to fulfill all customer requests by maximizing the potential of its resources. This research aims to identify the causal factors of the high breakdown time of Line 3 No 28 printing press and to recommend an increase in the effectiveness of Line 3 No 28 Printing machines using the Overall Equipment Effectiveness (OEE) method. The stages carried out in this study were through field observations, collecting data from the company's ERP and Jasper software systems, analysis, and recommendations the improvement. Data collection through interviews was carried out by direct interviews with relevant expert respondents using a fishbone diagram and FMEA methods. The main cause of the long breakdown time is the delay in the material powder entering the production area from the weighing area and the thin printing of the tank. The advice given is that the company implements OEE calculations every day so that the effectiveness of each machine can be monitored, the company increases the awareness of autonomous maintenance for everyone who works for the company and controls the improvements that have been recommended.
Pengurangan Bullwhip Effect pada Rantai Pasok Air Minum Dalam Kemasan Menggunakan Metode Collaborative Planning, Forecasting, and Replenishment (CPFR): Studi Kasus Muhammad Qadafi; Endang Suhendar; Aliffia Teja Prasasty
Operations Excellence: Journal of Applied Industrial Engineering Vol. 14, No. 3, (2022): OE NOVEMBER 2022
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2022.v14.i3.065

Abstract

CV Tirta Alam Dodu is a privately owned company engaged in the beverage industry in the form of AMDK. The problem faced by the company is that there is a difference between demand and sales, or better known as the bullwhip effect problem. The purpose of this study is to reduce the bullwhip effect on the supply chain and optimize the amount of product inventory according to the amount of demand. The method used is the Collaborative Planning, Forecasting, and Replenishment (CPFR) method. Based on the results of the research conducted, it can be concluded that the analysis of demand forecasting calculations on AMDK products at CV Tirta Alam Dodu was carried out using historical data on product demand through five analytical methods, including Linear Trend, Moving Average, Exponential Smoothing, Decomposition, and Winter's Model. The best forecasting resulted in Winter's Model which showed the smallest error value compared to the other four models. The way to minimize so that it does not become a bullwhip effect is to use the CPFR method, where the bullwhip effect value is obtained on glass mineral water products and gallons of mineral water of 0,985 and 0,898, respectively. This result shows that there is no amplification of demand and has reached the company's target, which is to fall below number one. The way to optimize inventory so that there is no excess stock or shortage of stock in the product is to make the amount of inventory based on the amount of demand from the forecasting results plus the safety stock.
Rancangan Model Konseptual denganTheory of Contraints untuk Menyeimbangkan Lini Produksi dan Meningkatkan Output pada Industri Komponen Otomotif Rachman Catur Kurniawan; Iveline Anne Marie; Nora Azmi
Operations Excellence: Journal of Applied Industrial Engineering Vol. 14, No. 3, (2022): OE NOVEMBER 2022
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2022.v14.i3.066

Abstract

Nowadays, competition among manufaktur industries is increasing rapidly. This competition causes similar industries to compete, including the automotive component industry. To win the competition, the automotive component manufaktur industry must carry out various repair methods. Improvements made include managing inventory, scheduling, delivery, quality management and eliminating waste. Based on observations, problems that often occur in the automotive component manufaktur industry are not achieving production output and unbalanced production lines so that problems such as waste and bootleneck arise. The purpose of this research is to design a model on the production line to increase production output and balance the production line. The method used to analyze and solve this problem is to design a conceptual model of Theory of Constraints (ToC). This method interprets structured and systematic stages to solve problems in the manufaktur industry. Based on the analysis, the results of this study produce a generic model that can be used in the automotive component industry. The models offered can increase production output, balance workloads and eliminate waste.
Comparison of Multi Layer Perceptron and Holt Winter Accuracy in Forecasting Suzuki Car Brand Production in Indonesia Muhammad Rizki Rachmadan
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 1, (2023): OE March 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i1.075

Abstract

Car production based on brand holding agents (APM) reports production value to the Indonesian Association of Automotive Industries (Gaikindo) in 2021 of 863,348 units with a percentage range of 11.4% by the Suzuki brand. Based on the public's interest in the need for a car which is the preferred option, the range and selling price are part of the considerations in determining the product of choice as the vehicle owner. This choice is important in activities to meet daily transportation needs. The purpose of this study is to obtain the most effective method and to maintain the number of vehicle unit production, production forecasts are needed according to people's purchasing power patterns using monthly data, especially the Suzuki brand. The research uses the Holt Winters measurement method with two hidden layers on the Multi Layer Perceptron (MLP) measurement method. The findings from this study are comparisons that can be said to be valid and can be an option in predicting data by utilizing methods to predict the amount of production by brand-holding agents. These results can contribute to optimizing the number of production results so that there are no excess or shortage of unit stock. The results showed that forecasting using a Multi Layer Perceptron with two hidden layers produced an accurate value where the lowest value at the Root Mean Square Error (RMSE) was 889.851 and the Mean Absolute Percentage Error (MAPE) was 9.3368.
Planning to improve the quality of public services using servqual and Quality Function Deployment integration Anis Saleh; Yan Herdianzah; Andi Pawennari; Arfandi Ahmad
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 1, (2023): OE March 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i1.068

Abstract

Service is any activity that is intended or intended to provide satisfaction to customers, but in fact, there are still several service systems that are always complained about by the community, including the problem of family cards (KK) and identity cards (KTP) because these services are the most dominant in the Sepee District Office. This study aims to obtain the quality of service in the district so that it can be repaired or improved the service system. This study uses the integration of Service Quality (Servqual) with a 5-dimensional approach to service quality, namely Tangibles, Reliability, Assurance, Responsive, and Empathy with the integration of Quality Function Deployment (QFD) to create a development and planning process in setting specifications for community needs and evaluating strengths and weaknesses on the service process. The results of Servqual and QFD integration in this study can be seen from the Q value which is not in accordance with service quality standards, the Q value shows 0.86 meaning that service quality cannot be said to be good because 0.86 ≤ 1. Based on the Cartesian diagram, 8 attributes are found. In quadrant A high-expectation value and low-performance value). According to the community, the highest attribute whose perceived value is low but whose expectation value is high is that service facilities and infrastructure are complete and sophisticated.
Optimization of plastic injection molding process parameters for cowl B (L/R) sink mark defects by using Taguchi methods and ANOVA Eko Ari Wibowo; Muhammad Nur Wahyu Hidayah; Rohmat Setiawan; Yohanes Trijoko Wibowo; Bonaventura Lingga Krisna
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 1, (2023): OE March 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i1.069

Abstract

The plastic injection molding process on Cowl B (L/R) products that have been carried out has sink mark defects. The defects that arise occur because the composition of injection molding parameter values is not optimal in the variables of melt temperature, mold temperature, packing time, packing pressure, and cooling time. The purpose of this study is to find the optimal composition of parameter values for each variable, to minimize sink mark defects in the product. The analysis process begins with the preparation of an orthogonal array matrix to determine the design parameters to be simulated on Autodesk mold flow. These results are evaluated with a signal-to-noise ratio to determine the effect of each parameter value composition on the results of the analysis process. The Analysis of Variance (ANOVA) method is used to estimate the contribution of each independent variable to all response measurements (the dependent variable). The optimization results for sink mark defects in the sink mark index value of 1.4494%, volumetric shrinkage of 0.5053%, and sink mark estimate of 0.0608 mm are found in the composition of the parameter values of melt temperature 200°C, mold temperature 80°C, packing time 30 seconds, packing pressure 80 MPa and a cooling time of 13,365 seconds. This data is used as a reference in determining parameters before production is carried out on plastic injection molding machines so that the time and cost of testing the injection molding process are optimal.
Design of walking and sitting aids for the elderly using the kano method Muhamad Mukafi; Ahmad Dzulfikri
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 1, (2023): OE March 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i1.070

Abstract

Normal human growth with age in the process of life tries to adapt to environmental conditions. It is often found that those who experience a decrease in walking activity, this is due to decreased function of the muscles and limbs. A walker (Walker) is the right solution to help with their activities. The design development of walking aids (Walker) continues to be developed for the needs of consumers, especially the elderly and injured feet. The purpose of this product design, which is to facilitate Walker users in resting to sit after a long walk without having to look for a place to sit and is available directly with the Walker, besides that it can also be used as a wheelchair with the help of ot hers. The features needed can be identified based on the results of a questionnaire which is the basis for the design development of walkers (Walkers) that have been on the market. The output of the questionnaire was analyzed by noting important features using the Kano Method. The research results are in the form of two features, with categories in the form of attractive that need to be developed. The features in question are the addition of seats, backrests, and wheels.
Analysis of Causes of Piping Welding Defects in Steam Gas Power Plants with FMEA and AHP method Horas Canman; Hasbullah Hasbullah
Operations Excellence: Journal of Applied Industrial Engineering Vol. 15, No. 1, (2023): OE March 2023
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/oe.2023.v15.i1.072

Abstract

High welding intensity is an integral part of the construction process of a Steam Gas Power Plant (PLTGU). The existence of weld defects has a significant potential for rework, additional construction costs, and delays in project completion. In the fabrication of pipe joints by welding in the PLTGU additional construction project with a capacity of 650 MW in Muara Tawar, welded joints were found to be rejected at 22.44%. This study aimed to analyze and determine the leading causes of rejected weld defects at the welded joint using the methods used, namely FMEA and AHP. Based on the Pareto diagram, it is known that two types of welding defects dominantly occur in welded joints which will then become the priority for repairs carried out by the contractor, namely porosity and cluster porosity. Based on the FMEA method, it is known that two groups of Risk Priority Number (RPN) values differ quite a lot, namely the group with low RPN values (1-140) and the group.  

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