Yugoslav Journal of Operations Research最新文献_第2页

Decision making model for detecting infected people with COVID-19 COVID-19感染者检测决策模型

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221115009m

S. Mahmood

引用次数: 0

Team-bounded DEA efficiency scores: The case of UEFA Champions League Players 球队边界DEA效率得分:欧冠球员的案例

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230615022i

Luka Ivanovic, S. Radovanović, G. Savić, Boris Delibasic, Milena Popovic

{"title":"Team-bounded DEA efficiency scores: The case of UEFA Champions League Players","authors":"Luka Ivanovic, S. Radovanović, G. Savić, Boris Delibasic, Milena Popovic","doi":"10.2298/yjor230615022i","DOIUrl":"https://doi.org/10.2298/yjor230615022i","url":null,"abstract":"Each player puts in time and effort to achieve results during a game, which can contribute to the team?s overall score. However, the combined effort of the whole team is a hidden factor that impacts a player?s outcomes. With this in mind, the aim of this study is to improve the DEA methodology by considering team performance when calculating efficiency scores. In this study, we introduce a new way to estimate efficiency using data envelopment analysis, which takes into account how the team performs. To achieve this, we use a single mathematical model that limits the player?s efficiency score based on the team performance. This ensures that the efficiency score cannot be more than ? times the average team efficiency score. The results from applying this new model to the UEFA Champions League 2021/22 season indicate that inefficient teammates significantly impact efficiency scores. However, when the entire team performs well, any decrease in efficiency scores is not substantial. The key advantage of these new efficiency scores is that they help pinpoint weak links within each team and identify areas that need improvement to enhance individual efficiency. Consequently, coaches and managers can utilize this model to identify areas for team enhancement, as well as players to improve their performance.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76849549","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

Entrepreneurs’ preferences towards online market research packages: A discrete choice analysis 企业家对网络市场调研包的偏好:一个离散选择分析

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230815026n

Ognjen Nikolic

{"title":"Entrepreneurs’ preferences towards online market research packages: A discrete choice analysis","authors":"Ognjen Nikolic","doi":"10.2298/yjor230815026n","DOIUrl":"https://doi.org/10.2298/yjor230815026n","url":null,"abstract":"Startups have become a buzzword in the last couple of years, and entrepreneurship became career path for a number of people in the world. With all the advances in education and government subsidizing all over the world, still, statistics shows only a small percentage of successful startups. Studies have shown that the one the leading reasons for startup failure is the misreading of market?s needs. The aim of this paper is to determine the approach to market research, knowledge of tools and methods, and preferences towards online market research tools of entrepreneurs by using Discrete Choice Analysis. The research gathered 187 valid responses from a panel of participants working on developing new products and business, using an online survey tool. In the paper it is shown that the most important attributes for entrepreneurs are the price of the market research tool, followed by the level of details in the report generated, with more in-depth analysis regarding segmentation, simulations, and Marginal Willingness to Pay in the further chapters. The results of the research imply the need for a market research business model optimized for those starting a new business, focused primarily on detailed reporting and analysis, with the pricing model adjusted to the lack of resources entrepreneurs face at the start of their ventures, which would help them better understand the market-fit at the beginning and raise the statistic of successful startups.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135449560","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

Metric on the space of systems behavior functions represented by fuzzy measures 用模糊测度表示的系统行为函数空间上的度量

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230315012b

V. Bocharnikov, S. Sveshnikov

{"title":"Metric on the space of systems behavior functions represented by fuzzy measures","authors":"V. Bocharnikov, S. Sveshnikov","doi":"10.2298/yjor230315012b","DOIUrl":"https://doi.org/10.2298/yjor230315012b","url":null,"abstract":"G. Klir proposed to describe the behavior of complex systems using behavior functions (BFs) - invariant constraints on the set of system states. BFs are one of the most productive tools for studying the functioning of systems. To study systems, it is necessary to have a metric for measuring of the difference between two BFs. To describe BFs modern researchers do not use distributions other than probability or possibility. But these distributions can be considered as special cases of Sugeno fuzzy measures, the use of which greatly expands the possibilities in the study of systems. However, metrics to measure the difference between fuzzy measures have not been developed. Therefore, in this article, the authors proposed a new metric and an algorithm for its calculation for the case when BFs are described by Sugeno fuzzy measures. This metric is based on the Cartesian product of fuzzy measures and the use of our proposed concentration function. The metric makes it possible to compare the behavior of systems in the case of describing BFs by Sugeno fuzzy measures with different modalities, as well as to ensure the priority of taking into account the set of the most significant states of the system.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75289519","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

Numerical integration approximations to estimate the Weitzman overlapping measure: Weibull distributions 估计Weitzman重叠测度的数值积分近似:威布尔分布

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221215021e

Omar M. Eidous, Mervat Al-Hayja`a

引用次数: 0

Process analysis and optimal facility layout planning in manufacturing systems 制造系统的工艺分析和优化设施布局规划

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor2105015033c

C. Ceylan, Hüseyin Başkurt, Yasin Erkan, Şeymanur Uğur

{"title":"Process analysis and optimal facility layout planning in manufacturing systems","authors":"C. Ceylan, Hüseyin Başkurt, Yasin Erkan, Şeymanur Uğur","doi":"10.2298/yjor2105015033c","DOIUrl":"https://doi.org/10.2298/yjor2105015033c","url":null,"abstract":"In this article, it is emphasized that the process analysis for companies is carried out by using the DISCO process mining program and the results are interpreted and developed. In the light of machine and worker occupancy information obtained as a result of process analysis, imbalances, if any, are detected. These imbalances are resolved by arranging job assignments. Another information that we obtain is the time elapsed until the processing of any workpiece on a machine is finished. This time consists of the time elapsed between the machines and the waiting time in the queue of the machine to be processed. The waiting time in the queue of the machine will be improved by adjusting the workload balance of the machines and the transportation times will be improved by creating the best plant layout suitable for the process. As a result, the facility layout of the factory was made considering the functional grouping. In the study, a layout is designed in accordance with the workflow of the products. With this newly designed plan, it has been determined that the products can be produced by covering 50% less transport distance. In addition, the workload imbalances of the machines and workers were corrected by changes in job assignments. This has reduced the cycle time of a product by eliminating bottlenecks at the factory.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85599411","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

Decision making in fuzzy closed loop dual channel supply chain 模糊闭环双通道供应链中的决策

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230115014m

A. Mondal, J. Kumar, J. Kumar

引用次数: 0

Neutrosophic MAGDM based on critic-EDAS strategy using geometric aggregation operator 基于几何聚集算子的临界edas策略的中性MAGDM

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221017016m

Rama Mallick, Surapati Pramanik, B. Giri

引用次数: 1

A stochastic inventory model with price-sensitive demand, restricted shortage and promotional efforts 具有价格敏感需求、有限短缺和促销努力的随机库存模型

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor220915010k

U. Khedlekar, Lalji Kumar, Mamta Keswani

{"title":"A stochastic inventory model with price-sensitive demand, restricted shortage and promotional efforts","authors":"U. Khedlekar, Lalji Kumar, Mamta Keswani","doi":"10.2298/yjor220915010k","DOIUrl":"https://doi.org/10.2298/yjor220915010k","url":null,"abstract":"This paper is attempt to develop a stochastic inventory model with quadratic price-sensitive demand. Objective function is developed by incorporating promotional efforts to boost the market demand, preservation technology to reduce the rate of deterioration, proportionate shortage time and partial backloggings. The proposed work is to generalise the stochastic demand with different probability distributions and their comparisons. The objective is to find the optimal price, optimal replenishment, and optimal preservation technology investment while optimizing the total profit per unit time. In the case of partial backlogging and lost sale, we deduced the optimal replenishment schedules for respective price and preservation technology cost. Also, we shown analytically and graphically that the total profit per unit time is a concave function with respect to per unit time, price, and preservation cost. The theoretical implications have been validated by useful results and numericals. Also, we examine the impact of various parameters for the best course of action. The conclusions drawn from the assessment might be useful for managerial purposes.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80307060","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

A matrix geometric solution of a multi-server queue with waiting servers and customers’ impatience under variant working vacation and vacation interruption 在不同休假和休假中断情况下，具有等待服务器和客户不耐烦的多服务器队列的矩阵几何解

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor220315001z

Ines Ziad, Vijaya Laxmi, Girija Bhavani, A. Bouchentouf, Shakir Majid

引用次数: 0