{"title":"Special Issue on “Managing Supply Chain Resilience in the Digital Economy Era”","authors":"","doi":"10.1111/itor.13549","DOIUrl":"https://doi.org/10.1111/itor.13549","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1821-1822"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860539","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.13554","DOIUrl":"https://doi.org/10.1111/itor.13554","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1825-1826"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860541","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.13555","DOIUrl":"https://doi.org/10.1111/itor.13555","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1827-1828"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860542","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 “Metaheuristics: Advances and Applications”","authors":"","doi":"10.1111/itor.13566","DOIUrl":"https://doi.org/10.1111/itor.13566","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1816-1817"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860712","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.13553","DOIUrl":"https://doi.org/10.1111/itor.13553","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1823-1824"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860540","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 “Agricultural E-commerce and Logistics Operations in the Era of Digital Economy”","authors":"","doi":"10.1111/itor.13533","DOIUrl":"https://doi.org/10.1111/itor.13533","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1818-1820"},"PeriodicalIF":3.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860538","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}
We propose easy-to-implement heuristics for time-constrained applications of a problem referred to in the literature as the facility location problem with immobile servers, stochastic demand, and congestion, the service system design problem, or the immobile server problem (ISP). The problem is typically posed as one of allocating capacity to a set of M/M/1 queues to which customers with stochastic demand are assigned with the objective of minimizing a cost function composed of a fixed capacity-acquisition cost, a variable customer-assignment cost, and an expected-waiting-time cost. The expected-waiting-time cost results in a nonlinear term in the objective function of the standard binary programming formulation of the problem. Thus, the solution approaches proposed in the literature are either sophisticated linearization or relaxation schemes, or metaheuristics. In this study, we demonstrate that an ensemble of straightforward, greedy heuristics can rapidly find high-quality solutions. In addition to filling a gap in the literature on ISP heuristics, new stopping criteria for an existing cutting plane algorithm are proposed and tested, and a new mixed-integer linear model requiring no iterating algorithm is developed. In many cases, our heuristic approach finds solutions of the same or better quality than those found by exact methods implemented with expensive, state-of-the-art mathematical programming software, in particular a commercial nonlinear mixed-integer linear programming solver, given a five-minute time limit.
{"title":"Fast heuristics for the time-constrained immobile server problem","authors":"Adam Q. Colley, Eli V. Olinick","doi":"10.1111/itor.13564","DOIUrl":"https://doi.org/10.1111/itor.13564","url":null,"abstract":"<p>We propose easy-to-implement heuristics for time-constrained applications of a problem referred to in the literature as the facility location problem with immobile servers, stochastic demand, and congestion, the service system design problem, or the immobile server problem (ISP). The problem is typically posed as one of allocating capacity to a set of M/M/1 queues to which customers with stochastic demand are assigned with the objective of minimizing a cost function composed of a fixed capacity-acquisition cost, a variable customer-assignment cost, and an expected-waiting-time cost. The expected-waiting-time cost results in a nonlinear term in the objective function of the standard binary programming formulation of the problem. Thus, the solution approaches proposed in the literature are either sophisticated linearization or relaxation schemes, or metaheuristics. In this study, we demonstrate that an ensemble of straightforward, greedy heuristics can rapidly find high-quality solutions. In addition to filling a gap in the literature on ISP heuristics, new stopping criteria for an existing cutting plane algorithm are proposed and tested, and a new mixed-integer linear model requiring no iterating algorithm is developed. In many cases, our heuristic approach finds solutions of the same or better quality than those found by exact methods implemented with expensive, state-of-the-art mathematical programming software, in particular a commercial nonlinear mixed-integer linear programming solver, given a five-minute time limit.</p>","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 3","pages":"1282-1311"},"PeriodicalIF":3.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/itor.13564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860509","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}
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.13531","DOIUrl":"https://doi.org/10.1111/itor.13531","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 2","pages":"1220-1221"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404300","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.13528","DOIUrl":"https://doi.org/10.1111/itor.13528","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 2","pages":"1214-1215"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404275","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.13529","DOIUrl":"https://doi.org/10.1111/itor.13529","url":null,"abstract":"","PeriodicalId":49176,"journal":{"name":"International Transactions in Operational Research","volume":"32 2","pages":"1216-1217"},"PeriodicalIF":3.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404276","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}
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