Jurnal Optimasi Sistem Industri最新文献_第2页

Application of the Total Productive Maintenance to Increase the Overall Value of Equipment Effectiveness on Ventilator Machines 全面生产性维修在通风机上的应用，提高设备效能的整体价值

Jurnal Optimasi Sistem Industri Pub Date : 2023-05-31 DOI: 10.25077/josi.v22.n1.p52-60.2023

H. Kurnia, Andini Putri Riandani, Tri Aprianto

{"title":"Application of the Total Productive Maintenance to Increase the Overall Value of Equipment Effectiveness on Ventilator Machines","authors":"H. Kurnia, Andini Putri Riandani, Tri Aprianto","doi":"10.25077/josi.v22.n1.p52-60.2023","DOIUrl":"https://doi.org/10.25077/josi.v22.n1.p52-60.2023","url":null,"abstract":"A ventilator machine is a medical device that plays an important role in handling Covid-19 cases during a pandemic. Covid 19 patients are arriving at a referral hospital in Jakarta, meaning that the hospital must prepare its medical equipment, including a ventilator machine. The ventilator machine experienced problems because the efficiency of the machine decreased so many patients waited in the ICU room. Machine effectiveness has an average value of 62.26% so it has an impact on disrupting patient services at home. The purpose of this research is to look for factors that cause the lack of effective value of ventilator machines and find effective solutions to increase the effectiveness of ventilator machines so that they can serve Covid-19 patients during a pandemic. This research method combines Focus Group Discussion in determining 5W+1H and implementing the pillars of Total Productive Maintenance to improve the Overall Effectiveness of Equipment on Ventilator machines. This study found a breakdown factor of 54.10%, idle and minor loss of 41.20%, and others of 4.70%. The effect of overall improvement has been able to increase the average effectiveness value by 85.00% from Sep 2021-Feb 2022, so this is supported by the hospital's program in terms of increasing the effectiveness of machines in patient care.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44454390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intuitionistic Fuzzy AHP and WASPAS to Assess Service Quality in Online Transportation 基于直觉模糊AHP和WASPAS的在线运输服务质量评估

Jurnal Optimasi Sistem Industri Pub Date : 2023-05-31 DOI: 10.25077/josi.v22.n1.p38-51.2023

A. Garside, Rara Putri Ayuning Tyas, Rahmad Wisnu Wardana

{"title":"Intuitionistic Fuzzy AHP and WASPAS to Assess Service Quality in Online Transportation","authors":"A. Garside, Rara Putri Ayuning Tyas, Rahmad Wisnu Wardana","doi":"10.25077/josi.v22.n1.p38-51.2023","DOIUrl":"https://doi.org/10.25077/josi.v22.n1.p38-51.2023","url":null,"abstract":"Indonesia is currently entering a new normal era; this requires people to adapt to the clean-living habit in accordance with health standards in order to carry out normal activities. At the same time, online transportation services have reopened for activity. The service quality provided by online ride-hailing companies (i.e., ojek) such as Gojek, Grab, and Maxim must now consider matters relating to user safety. This study proposes Multi Criteria Decision Making (MCDM) as a method for assessing the service quality of online transportation service providers and uses the Pandemic-SERVQUAL 4.0 model. Pandemi-SERVQUAL 4.0 model adds two new criteria, namely \"pandemic\" and \"industry 4.0\". The addition of two new criteria that are more relevant to the current circumstances will increase the accuracy of the research. This study aims to propose the integration of Interval Valued Intuitionistic Fuzzy Analytical Hierarchy Process (IVIF-AHP) to determine the criteria weight and Interval Valued Intuitionistic Fuzzy Weighted Aggregated Sum-Product Assessment (IVIF-WASPAS) to assess the service quality of several online transportation service providers based on the obtained criteria weights. From the results of the service quality assessment using the integration of IVIF-AHP and IVIF-WASPAS, the ranking of online transportation service providers during the new normal era were Grab-car, Go-car, and Maxim-car.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43475894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Sex Differences and Experience of Using Virtual Reality on Presence 性别差异与虚拟现实体验对在场感的影响

Jurnal Optimasi Sistem Industri Pub Date : 2023-05-31 DOI: 10.25077/josi.v22.n1.p61-68.2023

Dian Putrawangsa, C. Theresia, Thedy Yogasara, Y. Theopilus

引用次数: 0

Total Tardiness Minimization in a Single-Machine with Periodical Resource Constraints 具有周期性资源约束的单机总延迟最小化

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-19 DOI: 10.25077/josi.v21.n2.p97-105.2022

B. Prata, L. R. Abreu, M. S. Nagano

{"title":"Total Tardiness Minimization in a Single-Machine with Periodical Resource Constraints","authors":"B. Prata, L. R. Abreu, M. S. Nagano","doi":"10.25077/josi.v21.n2.p97-105.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p97-105.2022","url":null,"abstract":"In this paper we introduce a variant of the single machine considering resource restriction per period. The objective function to be minimized is the total tardiness. We proposed an integer linear programming modeling based on a bin packing formulation. In view of the NP-hardness of the introduced variant, heuristic algorithms are required to find high-quality solutions within an admissible computation times. In this sense, we present a new hybrid matheuristic called Relax-and-Fix with Variable Fixing Search (RFVFS). This innovative solution approach combines the relax-and-fix algorithm and a strategy for the fixation of decision variables based on the concept of the variable neighborhood search metaheuristic. As statistical indicators to evaluate the solution procedures under comparison, we employ the Average Relative Deviation Index (ARDI) and the Success Rate (SR). We performed extensive computational experimentation with a testbed composed by 450 proposed test problems. Considering the results for the number of jobs, the RFVFS returned ARDI and SR values of 35.6% and 41.3%, respectively. Our proposal outperformed the best solution approach available for a closely-related problem with statistical significance.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42746895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode 矩形石墨电极下沉降电火花加工工艺参数的增强材料去除率优化

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-19 DOI: 10.25077/josi.v21.n2.p87-96.2022

S. Sumanto, Acim Maulana, D. Mulyadi, Khoirudin Khoirudin, S. Siswanto, S. Sukarman, Ade Suhara, Safril Safril

{"title":"Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode","authors":"S. Sumanto, Acim Maulana, D. Mulyadi, Khoirudin Khoirudin, S. Siswanto, S. Sukarman, Ade Suhara, Safril Safril","doi":"10.25077/josi.v21.n2.p87-96.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p87-96.2022","url":null,"abstract":"This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41764117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors Affecting Millennials Purchase Intention and Sustainable Consumption of Organic Food 影响千禧一代购买意愿和有机食品可持续消费的因素

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-19 DOI: 10.25077/josi.v21.n2.p106-114.2022

Ni Made Dewi Ayu Murti, A. D. Ekawati

{"title":"Factors Affecting Millennials Purchase Intention and Sustainable Consumption of Organic Food","authors":"Ni Made Dewi Ayu Murti, A. D. Ekawati","doi":"10.25077/josi.v21.n2.p106-114.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p106-114.2022","url":null,"abstract":"Organic food refers to the products produced in conventional way, without hazardous materials. Millennials are the generation most attractive to organic food market. This study aims to analyze whether factors such as environmental knowledge, environmental awareness, health awareness and social awareness affecting purchase intention and sustainable consumption of the millennials towards organic food. A questionnaire used to evaluate the relationships between the six constructs. The findings showed that 340 respondents have met requirements for analysis. The method used was Structural Equation Model (SEM). The research findings find out the main factors that influence purchase intention and sustainable consumption of the millennial generation towards organic food. This research is expected to help non-governmental organizations increase purchase intention and investigate factors that influence the sustainable consumption of organic food in the millennial generation. This research has implications for the organic food industry, especially organic food producers, namely by applying the packaging sustainability method to reduce waste in the environment.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48685294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Genetic Algorithms to Solve MTSP Problems with Priority (Case Study at the Jakarta Street Lighting Service) 遗传算法在优先解决中期战略计划问题中的应用（雅加达街道照明服务的案例研究）

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-01 DOI: 10.25077/josi.v21.n2.p75-86.2022

S. S. Tjandra, F. Setiawan, Hanoum Salsabila

{"title":"Application of Genetic Algorithms to Solve MTSP Problems with Priority (Case Study at the Jakarta Street Lighting Service)","authors":"S. S. Tjandra, F. Setiawan, Hanoum Salsabila","doi":"10.25077/josi.v21.n2.p75-86.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p75-86.2022","url":null,"abstract":"Transportation is one thing that is very important and is the highest cost in the supply chain. One way to reduce these costs is to optimize vehicle routes. The Multiple Traveling Salesman Problem (MTSP) and Capacitated Vehicle Routing Problem (CVRP) are models that have been extensively researched to optimize vehicle routes. In its development based on actual events in the real world, some priorities must be visited first in optimizing vehicle routes. Several studies on MTSP and CVRP models have been conducted with exact solutions and algorithms. In a real case in the Jakarta City Street Lighting Section, the problem of determining the route in three shifts is a crucial problem that must be resolved to increase worker productivity to improve services. Services in MCB (Miniature Circuit Breaker) installation and maintenance activities for general street lights and priority is given to light points that require replacement. Because, in this case, the delivery capacity is not taken into account, the priority of the lights visited is random, and the number of street light points is enormous, in this study, we use the MTSP method with priority and solve by a genetic algorithm assisted by the nearest neighbor algorithm. From the resolution of this problem, it was found that the travel time reduction was 32 % for shift 1, 24 % for shift 2, and 23 % for shift 3. Of course, this time reduction will impact worker productivity so that MCB installation can be done faster for all lights and replace a dead lamp.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45474429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting Human Reliability based on Individual’s Resting Period: Effect of Physical Workload Rate 基于个体休息时间的人的可靠性预测：体力劳动率的影响

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-01 DOI: 10.25077/josi.v21.n2.p66-74.2022

Caecilia Sri Wahyuning, Saras Atiko

{"title":"Predicting Human Reliability based on Individual’s Resting Period: Effect of Physical Workload Rate","authors":"Caecilia Sri Wahyuning, Saras Atiko","doi":"10.25077/josi.v21.n2.p66-74.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p66-74.2022","url":null,"abstract":"When a person is exposed to a prolonged workload, he/she enters a fatigue phase, the indication is the decline of cognitive performance that leading to human error. As an integral part of a system, human contributes to system reliability; therefore, it plays an important role in potential failure. Those, it is necessary to investigate how human reliability relates to physical workload rate, in order to predict maximum work duration to eliminate potential failure. A physical experiment involving 20 participants was conducted to generate medium workload, followed by Stroop test to observe selective attention and cognitive control as a form of cognitive performance. The physical workload was observed through energy expenditure and oxygen consumption during physical activity, and cognitive performance through response error time on the Stroop test. The usage of Weibull distribution was aimed to obtain reliabilities for each participant. There was a decline in reliability for all participants from one test to the other. Based on scale and form parameters, the prediction of resting time was based on mean time to human error (MTTHE), and from this experiment, varied MTTHE from each participant were obtained. The variation was created by differences in physical performance, cognitive capabilities, and other contributing factors such as environment and time of the implementation of the experiment. From this research, it was evident that human reliability can be utilized to predict potential failure in humans, which then implies a preventive action is necessitated to prevent failure from manifesting in the shape of taking a break/rest or reducing work rhythm. The application of human reliability in human resource management can be directed towards fatigue management and operator-related operational management.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46530518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Driving Comparative Life Cycle Cost Assessment of Conventional and Electric Motorcycles in Indonesia: Monte Carlo Analysis 印尼传统摩托车与电动摩托车寿命周期成本比较评估:蒙特卡洛分析

Jurnal Optimasi Sistem Industri Pub Date : 2022-12-01 DOI: 10.25077/josi.v21.n2.p55-65.2022

Lsa Aldira Hafidza, Yuniaristanto, W. Sutopo, M. Hisjam

{"title":"Evaluation of Driving Comparative Life Cycle Cost Assessment of Conventional and Electric Motorcycles in Indonesia: Monte Carlo Analysis","authors":"Lsa Aldira Hafidza, Yuniaristanto, W. Sutopo, M. Hisjam","doi":"10.25077/josi.v21.n2.p55-65.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n2.p55-65.2022","url":null,"abstract":"The adoption of electric vehicles (EVs) is one of the solutions to reduce emission problems. Vehicle cost analysis is one of the keys to seizing the Indonesian market. As a consumer, it is not only the purchase price that needs to be considered, but the life cycle costs throughout ownership also need to be considered in the purchase. This study discusses the life cycle cost (LCC) of EVs in Indonesia, especially electric motorcycles (EMs), which will be compared with conventional motorcycles (CMs). In particular, this study aims to encourage the government's target for ownership of 2.1 million EMs in Indonesia by 2025. The novelty of this research is to develop a more comprehensive LCC model by considering the costs in terms of tangible and intangible to compare the two types of motorcycles using Monte Carlo simulation. This simulation is used to coordinate the behavioral uncertainty of motorcycle users. As a result, the value of an EM is more economical than CM for various users. The average value percentage of EMs is lower than CMs by 45% (IDR 30,6 million). In addition, several scenarios are also analyzed to maximize consumer welfare in Indonesia.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44747227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Order Allocation Model Considering Transportation Alternatives and Lateral Transhipment 考虑运输方案和横向转运的订单分配模型

Jurnal Optimasi Sistem Industri Pub Date : 2022-05-31 DOI: 10.25077/josi.v21.n1.p38-45.2022

Ashylla Maharani, C. N. Rosyidi, P. W. Laksono

{"title":"Order Allocation Model Considering Transportation Alternatives and Lateral Transhipment","authors":"Ashylla Maharani, C. N. Rosyidi, P. W. Laksono","doi":"10.25077/josi.v21.n1.p38-45.2022","DOIUrl":"https://doi.org/10.25077/josi.v21.n1.p38-45.2022","url":null,"abstract":"Intense competition among companies encourages them to provide the best quality of products in competitive price. It is important for company to manage supply chain properly in order to achieve that. Selecting the best reliable supplier is the key to reduce purchasing cost, increase customer satisfaction and improve the competitive ability. In this study, we develop an order allocation model in multi echelon environment which includes supplier, manufacturer, and retailer. We consider transportation alternatives for the shipment from supplier to manufacturer and also the shipment from manufacturer to retailer. This model allows lateral transshipment between retailers. A Mixed Integer Linear Programming (MILP) is used to model the system. Sensitivity analysis is conducted at the end of the research. The result shows that the retailer demand, lead time, material variable price are sensitive to the objective function while the transportation costs from supplier to manufacturer, from manufacturer to retailers, and between retailers are not sensitive to the objective function. Retailer demand parameter is also sensitive to all decision variables. The transportation cost from supplier to manufacturer, material prices, and lead time are sensitive to the order allocation from manufacturer to supplier, while transportation cost from manufacturer to retailers and transportation cost between retailers are sensitive to the allocation of product sent from the manufacturer to retailers and the allocation of product sent between retailers.","PeriodicalId":30702,"journal":{"name":"Jurnal Optimasi Sistem Industri","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49048825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1