L. Alçada‐Almeida, N. Sousa, J. Coutinho‐Rodrigues
This article proposes a multi‐objective mixed‐integer linear programming model to assist event managers in obtaining and evaluating non‐dominated solutions to the problem of selecting a daily lineup of shows and activities for a festival – be it cultural, sports, ceremonial or any other kind. The model, which is especially adequate for designing festivals with public funding, has five objectives, relating to financial, logistical and how renowned the festival artists or acts are. It includes support for multiple days, multiple stages and different types of shows, all subject to constraints imposed by the intrinsic nature of the festival itself. The output of the model is a set of optimized daily lineups for the activities that constitute the festival, each corresponding to a particular compromise between the five objectives. The approach is demonstrated with a case study for a 5‐day festival, for which non‐dominated solutions are derived, presented and discussed. Results show that the model can provide a good variety of solutions while ensuring the persistence of the more desirable shows. The model is a novel decision support tool to assist in designing festival lineups that provide optimal audience experience, a key factor in attracting spectators, tourists and increasing comeback value.
{"title":"A multi‐objective model for publicly funded festival planning","authors":"L. Alçada‐Almeida, N. Sousa, J. Coutinho‐Rodrigues","doi":"10.1111/itor.13500","DOIUrl":"https://doi.org/10.1111/itor.13500","url":null,"abstract":"This article proposes a multi‐objective mixed‐integer linear programming model to assist event managers in obtaining and evaluating non‐dominated solutions to the problem of selecting a daily lineup of shows and activities for a festival – be it cultural, sports, ceremonial or any other kind. The model, which is especially adequate for designing festivals with public funding, has five objectives, relating to financial, logistical and how renowned the festival artists or acts are. It includes support for multiple days, multiple stages and different types of shows, all subject to constraints imposed by the intrinsic nature of the festival itself. The output of the model is a set of optimized daily lineups for the activities that constitute the festival, each corresponding to a particular compromise between the five objectives. The approach is demonstrated with a case study for a 5‐day festival, for which non‐dominated solutions are derived, presented and discussed. Results show that the model can provide a good variety of solutions while ensuring the persistence of the more desirable shows. The model is a novel decision support tool to assist in designing festival lineups that provide optimal audience experience, a key factor in attracting spectators, tourists and increasing comeback value.","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"152 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Efficient judicial systems are acknowledged to benefit economic growth, firm competition, entrepreneurship, and financial market development. The goal of this paper is to measure the relative technical inefficiency of Polish district courts for the period 2017–2021 in civil, criminal, and family cases. Unlike other papers on justice (in)efficiency, this study uses input‐specific and output‐specific production models combined with the Data Envelopment Analysis technique. This approach allows for assessment of the contributions of specific inputs and outputs to overall court inefficiency. The results show considerable differences in inefficiencies with regard to courts’ specific inputs and outputs and the types of cases being processed. The evidence shows that the greatest inefficiency is found among court workers (i.e., other judicial staff and judges), while among judges, it is civil judges, with this result being robust to the model's specification. According to the results, the year 2020 marked a clear increase in the inefficiency of almost all variables, which can be attributed to the Coronavirus Disease 2019 (COVID‐19) pandemic and restrictions on the functioning of the courts. Finally, the results also highlight a heterogeneity among courts depending on their geographical location and size, with courts related to the largest cities and those of large size tending to be the most inefficient.
{"title":"Evaluating input‐ and output‐specific inefficiency in courts of justice. An empirical study of Polish district courts","authors":"Magdalena Kapelko","doi":"10.1111/itor.13503","DOIUrl":"https://doi.org/10.1111/itor.13503","url":null,"abstract":"Efficient judicial systems are acknowledged to benefit economic growth, firm competition, entrepreneurship, and financial market development. The goal of this paper is to measure the relative technical inefficiency of Polish district courts for the period 2017–2021 in civil, criminal, and family cases. Unlike other papers on justice (in)efficiency, this study uses input‐specific and output‐specific production models combined with the Data Envelopment Analysis technique. This approach allows for assessment of the contributions of specific inputs and outputs to overall court inefficiency. The results show considerable differences in inefficiencies with regard to courts’ specific inputs and outputs and the types of cases being processed. The evidence shows that the greatest inefficiency is found among court workers (i.e., other judicial staff and judges), while among judges, it is civil judges, with this result being robust to the model's specification. According to the results, the year 2020 marked a clear increase in the inefficiency of almost all variables, which can be attributed to the Coronavirus Disease 2019 (COVID‐19) pandemic and restrictions on the functioning of the courts. Finally, the results also highlight a heterogeneity among courts depending on their geographical location and size, with courts related to the largest cities and those of large size tending to be the most inefficient.","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Product returns pose a significant challenge for online retailers, primarily due to consumer uncertainty, both before and after the purchase. These uncertainties may stem from factors such as the absence of a “touch and feel” experience, mismatched product expectations, or post‐purchase regret, where consumers change their minds. Online reviews, shared by previous consumers who have already experienced the products, can have a substantial impact not only on new consumers’ purchasing but also on return decisions. Surprisingly, there has been limited research to understand the influence of online reviews on product returns. This paper applies the input‐process‐output framework to conduct a comprehensive review and analysis of studies related to online reviews and product returns. Based on this review and analysis, a conceptual model is proposed, and an outline for the future research agenda is discussed.
{"title":"Effects of product online reviews on product returns: a review and classification of the literature","authors":"Yun Wang, Bo Yu, Jing Chen","doi":"10.1111/itor.13502","DOIUrl":"https://doi.org/10.1111/itor.13502","url":null,"abstract":"Product returns pose a significant challenge for online retailers, primarily due to consumer uncertainty, both before and after the purchase. These uncertainties may stem from factors such as the absence of a “touch and feel” experience, mismatched product expectations, or post‐purchase regret, where consumers change their minds. Online reviews, shared by previous consumers who have already experienced the products, can have a substantial impact not only on new consumers’ purchasing but also on return decisions. Surprisingly, there has been limited research to understand the influence of online reviews on product returns. This paper applies the input‐process‐output framework to conduct a comprehensive review and analysis of studies related to online reviews and product returns. Based on this review and analysis, a conceptual model is proposed, and an outline for the future research agenda is discussed.","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"14 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the realm of assessing scale efficiency (SE), it tends to be computed as a firm‐specific phenomenon rather than something associated with the whole shape of the frontier of the technology under evaluation. This circumstance may lead to inaccuracies in the conclusions drawn regarding the returns to scale (RTS) exhibited across the entire frontiers since they can be biased by the location of the observations. This paper addresses this gap by defining the notion of global SE measured through projecting synthetic observations randomly generated within a unit‐hypercube against the technologies under constant and variable RTS. Our approach enables the comparison of the local SE exhibited by each firm in relation to the global expected percentage of production points that display a similar type of RTS across the production frontier. The approach is illustrated through a numerical example and applied to a set of hospitals in Spain.
在评估规模效率（SE）的领域中，规模效率往往是作为企业特有的现象来计算的，而不是与所评估技术的整个前沿形状相关联。这种情况可能会导致有关整个前沿表现出的规模收益（RTS）的结论不准确，因为它们可能会因观测点的位置而产生偏差。本文针对这一缺陷，定义了全局 SE 的概念，即在 RTS 不变和可变的情况下，通过对单位超立方体内随机生成的合成观测数据与技术进行投影来衡量全局 SE。通过我们的方法，可以将每个企业的局部 SE 与在生产前沿显示类似 RTS 的生产点的全球预期百分比进行比较。该方法通过一个数字示例进行说明，并应用于西班牙的一组医院。
{"title":"Global scale efficiency in data envelopment analysis","authors":"Juan Aparicio, Daniel Santín","doi":"10.1111/itor.13501","DOIUrl":"https://doi.org/10.1111/itor.13501","url":null,"abstract":"In the realm of assessing scale efficiency (SE), it tends to be computed as a firm‐specific phenomenon rather than something associated with the whole shape of the frontier of the technology under evaluation. This circumstance may lead to inaccuracies in the conclusions drawn regarding the returns to scale (RTS) exhibited across the entire frontiers since they can be biased by the location of the observations. This paper addresses this gap by defining the notion of global SE measured through projecting synthetic observations randomly generated within a unit‐hypercube against the technologies under constant and variable RTS. Our approach enables the comparison of the local SE exhibited by each firm in relation to the global expected percentage of production points that display a similar type of RTS across the production frontier. The approach is illustrated through a numerical example and applied to a set of hospitals in Spain.","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"64 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141505591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Special Issue on “Optimizing Port and Maritime Logistics: Advances for Sustainable and Efficient Operations”","authors":"","doi":"10.1111/itor.13477","DOIUrl":"https://doi.org/10.1111/itor.13477","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"31 6","pages":"4404-4405"},"PeriodicalIF":3.1,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Special Issue on “Sharing Platforms for Sustainability: Exploring Strategies, Trade-offs, and Applications”","authors":"","doi":"10.1111/itor.13497","DOIUrl":"https://doi.org/10.1111/itor.13497","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"31 6","pages":"4402-4403"},"PeriodicalIF":3.1,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Davide La Torre, Hatem Masri, Constantin Zopounidis
{"title":"Special issue on “Multiple Criteria Decision Making for Sustainable Development Goals (SDGs)”","authors":"Davide La Torre, Hatem Masri, Constantin Zopounidis","doi":"10.1111/itor.13498","DOIUrl":"https://doi.org/10.1111/itor.13498","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"31 6","pages":"4406-4407"},"PeriodicalIF":3.1,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preface to the Special Issue on Operational Research Models for Blockchain","authors":"Tsan-Ming Choi (Jason)","doi":"10.1111/itor.13456","DOIUrl":"https://doi.org/10.1111/itor.13456","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"31 6","pages":"3563-3564"},"PeriodicalIF":3.1,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Special Issue on “Managing Supply Chain Resilience in the Digital Economy Era”","authors":"","doi":"10.1111/itor.13496","DOIUrl":"https://doi.org/10.1111/itor.13496","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"31 6","pages":"4400-4401"},"PeriodicalIF":3.1,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A scheduling problem for a two-stage flexible flow shop with s-batching machines motivated by processes in additive manufacturing is considered. A batch is a group of jobs that are processed together on a single machine. Each job belongs to an incompatible family. Only jobs of the same family can be batched together. A maximum batch size is given. A setup time occurs between different batches. The jobs of a batch are processed in a serial manner, that is, the processing time of a batch is the sum of the processing times of the jobs forming the batch. Batch availability is assumed. A job has a weight, a due date, and a release date. The total weighted tardiness is considered as performance measure. We establish a mixed integer linear programming formulation for this scheduling problem. For large-sized problem instances, an iterative decomposition approach (IDA) is proposed that uses a grouping genetic algorithm or an iterated local search (ILS) scheme to solve the single-stage subproblems. Moreover, an alternative ILS scheme based on a disjunctive graph representation of the problem at hand is designed. Results of computational experiments based on randomly generated problem instances demonstrate that the IDA hybridized with ILS outperforms the two other schemes.
本研究以增材制造工艺为动机，考虑了带有 s-batching 机器的两阶段柔性流动车间的调度问题。批次是指在一台机器上一起加工的一组作业。每个作业都属于一个不相容的系列。只有相同系列的作业才能被分批处理。批量的最大大小是给定的。不同批次之间有设置时间。批次中的作业以串行方式处理，即批次的处理时间是组成该批次的作业的处理时间之和。假定批次的可用性。一项作业有一个权重、一个到期日期和一个发布日期。总加权延迟时间被视为性能指标。我们为这个调度问题建立了一个混合整数线性规划公式。对于大型问题实例，我们提出了一种迭代分解方法（IDA），即使用分组遗传算法或迭代局部搜索（ILS）方案来解决单阶段子问题。此外，还设计了另一种基于手头问题的析取图表示的 ILS 方案。基于随机生成的问题实例的计算实验结果表明，IDA 与 ILS 的混合方案优于其他两种方案。
{"title":"Metaheuristics for solving a flexible flow-shop scheduling problem with s-batching machines","authors":"Jens Rocholl, Lars Mönch","doi":"10.1111/itor.13491","DOIUrl":"10.1111/itor.13491","url":null,"abstract":"<p>A scheduling problem for a two-stage flexible flow shop with s-batching machines motivated by processes in additive manufacturing is considered. A batch is a group of jobs that are processed together on a single machine. Each job belongs to an incompatible family. Only jobs of the same family can be batched together. A maximum batch size is given. A setup time occurs between different batches. The jobs of a batch are processed in a serial manner, that is, the processing time of a batch is the sum of the processing times of the jobs forming the batch. Batch availability is assumed. A job has a weight, a due date, and a release date. The total weighted tardiness is considered as performance measure. We establish a mixed integer linear programming formulation for this scheduling problem. For large-sized problem instances, an iterative decomposition approach (IDA) is proposed that uses a grouping genetic algorithm or an iterated local search (ILS) scheme to solve the single-stage subproblems. Moreover, an alternative ILS scheme based on a disjunctive graph representation of the problem at hand is designed. Results of computational experiments based on randomly generated problem instances demonstrate that the IDA hybridized with ILS outperforms the two other schemes.</p>","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 1","pages":"38-68"},"PeriodicalIF":3.1,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/itor.13491","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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