Operations Research and Decisions最新文献_第2页

The SEKO assignment. Efficient and fair assignment of students to multiple seminars SEKO任务。有效和公平地分配学生参加多个研讨会

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230301

Tobias Hoßfeld _

{"title":"The SEKO assignment. Efficient and fair assignment of students to multiple seminars","authors":"Tobias Hoßfeld _","doi":"10.37190/ord230301","DOIUrl":"https://doi.org/10.37190/ord230301","url":null,"abstract":"Seminars are offered to students for education in various disciplines. The seminars may be limited in terms of the maximum number of participants, e.g., to have lively interactions. Due to capacity limitations, those seminars are often offered several times to serve the students’ demands. Still, some seminars are more popular than others and it may not be possible to grant access to all interested students due to capacity limitations. In this paper, a simple, but efficient random selection using key objectives (SEKO) assignment strategy is proposed which achieves the following goals: (i) efficiency by utilizing all available seminar places, (ii) satisfying all students by trying to assign at least one seminar to each student, and (iii) fairness by considering the number of assigned seminars per student. We formulate various theoretical optimization models using integer linear programming (ILP) and compare their solutions to the SEKO assignment based on a real-world data set. The real-world data set is also used as the basis for generating large data sets to investigate the scalability in terms of demand and number of seminars. Furthermore, the first-in first-out (FIFO) assignment, as a typical implementation of fair assignments in practice, is compared to SEKO in terms of utilization and fairness. The results show that the FIFO assignment suffers in real world situations regarding fairness, while the SEKO assignment is close to the optimum and scales regarding computational time in contrast to the ILP.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","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":"135599932","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

Scenario planning as a new application area for TOPSIS 场景规划作为TOPSIS的一个新的应用领域

IF 0.4

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230202

Helena Gaspars-Wieloch

引用次数: 0

A comparative analysis of (s, Q) and (s, S) ordering policies in a queueing-inventory system with stock-dependent arrival and queue-dependent service process 具有库存依赖到达和队列依赖服务过程的排队-库存系统(s, Q)和(s, s)订购策略的比较分析

IF 0.4

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230207

C. Sugapriya, Murugesan Nithya, K. Jeganathan, S. Selvakumar, T. Harikrishnan

{"title":"A comparative analysis of (s, Q) and (s, S) ordering policies in a queueing-inventory system with stock-dependent arrival and queue-dependent service process","authors":"C. Sugapriya, Murugesan Nithya, K. Jeganathan, S. Selvakumar, T. Harikrishnan","doi":"10.37190/ord230207","DOIUrl":"https://doi.org/10.37190/ord230207","url":null,"abstract":"This article deals with a Markovian queuing-inventory system (MQIS) under the stochastic modeling technique. The arrival stream of this system is dependent on the present stock level at an instant. Meanwhile, the system focuses on reducing the waiting time of a unit by assuming a queue-dependent service policy (QDSP). The system consists of an infinite waiting hall to receive an arriving unit. The MQIS assumes that no unit of arrival is allowed when the stock level of the system is empty. The discussion of this MQIS runs over the two types of ordering principles named 1) (s, Q) 2) (s, S). According to both ordering principles, the assumed arrival and service patterns have been considered separately and classified as Model-I (M-I) and Model-II (M-II) respectively. The steady state of the system for both M-I and M-II is analysed and resolved under the Neuts matrix-geometric technique. The system performance measures of the system are also computed. The expected cost function of both M-I and M-II are constructed as well. Further, the necessary numerical illustrations are provided and distinguished for M-I and M-II to explore the proposed model. This paper finds the optimum ordering policy to execute the stock-dependent arrival and queue-dependent service strategies.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86406229","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

Integrating queue theory and multi-criteria decision-making tools for selecting roll-over car washing machine 结合排队理论和多准则决策工具的滚筒式洗车机选择

IF 0.4

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230206

Mehmet Ozcalici

引用次数: 0

Analysis of human resources productivity indicators with structural equations approach. Case study. Kerman executive agencies 用结构方程方法分析人力资源生产率指标。案例研究。克尔曼执行机构

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230303

Zohreh Mehtarizadeh

{"title":"Analysis of human resources productivity indicators with structural equations approach. Case study. Kerman executive agencies","authors":"Zohreh Mehtarizadeh","doi":"10.37190/ord230303","DOIUrl":"https://doi.org/10.37190/ord230303","url":null,"abstract":"This study aims to explain the indicators of human resource productivity management in Kerman executive agencies. It is a descriptive, correlational as well as a developmental study purposefully conducted as a survey in the field of human resources. The sample includes 30 experts in the field of management and administration. It was obtained by purposeful sampling method and included 524 employees of the Kerman executive agencies that were gathered by stratified sampling method. Two questionnaires were used by the experts to confirm the validity and reliability of the model and one questionnaire was used to answer the questions. The validity and reliability of all questionnaires were confirmed. AMOS and SPSS statistical software were used for data analysis. The 42 subscales of human resource productivity management are summarized in 5 factors (individual, organizational, complementary organizational, occupational, and extra-organizational). It is an applied developmental study considering the simultaneous identification of factors related to human resource productivity in line with the development indicators and can be used by all executive agencies throughout Iran.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","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":"135599316","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

Contagion between selected European indexes during the Covid-19 pandemic Covid-19大流行期间选定欧洲指数之间的传染

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Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230104

H. Gurgul, R. Syrek

引用次数: 0

Frequentist inference on traffic intensity of M/M/1 queuing system M/M/1排队系统交通强度的频率推理

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Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230102

K. Dutta, Amit Choudhury

引用次数: 0

Some equations to identify the threshold value in the DEMATEL method 一些方程在DEMATEL方法中识别阈值

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Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230201

Seyed Hossain Ebrahimi

{"title":"Some equations to identify the threshold value in the DEMATEL method","authors":"Seyed Hossain Ebrahimi","doi":"10.37190/ord230201","DOIUrl":"https://doi.org/10.37190/ord230201","url":null,"abstract":"DEMATEL technique is a graphical representation method to deal with complex systems. The final analyzed cause and effect categorization would be fundamentally dependent on the threshold value setting. This research is intended to present some mathematical models for calculating the threshold value in the DEMATEL method. The min(max) operator has been intentionally used for considering three equations to identify the threshold value. Additionally, the proposed mathematical equations are gradually developed to gain more useful data to yield a threshold value as well. Particularly, the expert’s initial scoring for building the primary matrix would also be applied in one equation. Results show eliciting an expert’s opinions regarding the value of a threshold value determination leads to setting relatively high thresholds. But, there would be an equation which takes advantage of more data derived from the total influence matrix T. Moreover, a span of different threshold values is gained by making use of the Hamacher t-conorms operator which especially would cause better complexity management of the final total matrix T based on expert’s opinions. As a contribution to this research, threshold value determination is developed mathematically by making use of the direct data gained by the total matrix T. Besides combining data derived from total matrix T, the initial influence direct matrix given by experts, a simpler aggregating procedure and no need for statistical information compared to special Lenth’s method hints at this research’s novelty as well.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75978911","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

Relationship marketing orientation in healthcare organisations with the AHP. Internal and external customer perspective AHP在医疗保健组织中的关系营销导向。内部和外部客户的观点

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Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230103

Y. Ersoy, Ali Tehci

引用次数: 0

Reliability analysis of N-policy vacation based FTC system subject to standby switching failures 基于n策略假期的FTC系统在备用切换故障下的可靠性分析

IF 0.4

Operations Research and Decisions Pub Date : 2023-01-01 DOI: 10.37190/ord230204

Sudeep Kumar, Ritu Gupta

引用次数: 1