Operations Research Perspectives最新文献_第5页

A simulation-optimization approach for integrating physical and financial flows in a supply chain under economic uncertainty 经济不确定条件下供应链中物流与资金流整合的模拟优化方法

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100270

Ehsan Badakhshan , Peter Ball

{"title":"A simulation-optimization approach for integrating physical and financial flows in a supply chain under economic uncertainty","authors":"Ehsan Badakhshan , Peter Ball","doi":"10.1016/j.orp.2023.100270","DOIUrl":"https://doi.org/10.1016/j.orp.2023.100270","url":null,"abstract":"<div><p>In the last decade, increasing costs and organizational concerns regarding the funding and allocation of financial resources have led to significant attention being given to financial flow and its effects on planning decisions throughout supply chain networks. This study aims to develop a simulation-optimization model to integrate the financial and physical flows in a supply chain planning problem under economic uncertainty. The simulation-optimization model includes a mixed-integer linear programming model and a simulation-based optimization model that are connected through an iterative process. The economic value added (EVA) index is used to measure the financial performance of the supply chain. This study extends the literature on two research domains namely supply chain planning and finance and simulation-optimization modelling for supply chain management. The proposed model applies a scenario approach to cope with economic uncertainty in the supply chain. To demonstrate the efficiency of the proposed model, the performance of the proposed model in solving a test problem from the recent literature is compared with the performance of a conventional simulation-based optimization and mixed-integer linear programming approaches. The results of the study show a minimum of 6% improvement in the EVA obtained from the proposed simulation-optimization model compared to the EVA obtained from the simulation-based optimization model in all the studied scenarios. Moreover, the standard deviation of the EVA obtained from the proposed simulation-optimization model is at least 69% lower than the EVA obtained from the mixed integer programming model in all the studied scenarios. This shows that the proposed simulation-optimisation approach is more robust to economic uncertainty than the mixed-integer linear programming approach.</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100270"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49870019","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}

引用次数: 0

A robust model for emergency supplies prepositioning and transportation considering road interruptions 考虑道路中断的应急物资预定位和运输的鲁棒模型

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100266

Wuyang Yu

引用次数: 1

Offshore windmill and substation maintenance planning with Distance, Fuel consumption and Tardiness optimisation 海上风电和变电站的维护计划与距离，燃料消耗和延迟优化

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100267

E. De Kuyffer, K. Shen, L. Martens, W. Joseph, T. De Pessemier

{"title":"Offshore windmill and substation maintenance planning with Distance, Fuel consumption and Tardiness optimisation","authors":"E. De Kuyffer, K. Shen, L. Martens, W. Joseph, T. De Pessemier","doi":"10.1016/j.orp.2023.100267","DOIUrl":"https://doi.org/10.1016/j.orp.2023.100267","url":null,"abstract":"<div><p>Despite a lot of research about predictive maintenance for onshore and offshore windmill farms, nearly no investigation has been performed to obtain the optimal sequence in which windmills are to be served in a predefined time frame. The higher fuel costs and the increasing time pressure on maintenance jobs urge the need for optimisation, so offshore windmills can be serviced at minimal costs and within a limited time frame. To minimise distance travelled, fuel consumption and average tardiness of all maintenance tasks to be carried out, a multi-objective, non-dominated sorting island model of genetic algorithms is used.</p><p>The following novel contributions are realised: (i) A multi-objective island model is used, where on each island a different genetic algorithm is used to minimise a separate cost function per island. (ii) A set of non-dominated maintenance sequences, shown as a Pareto plane, are computed and (iii) these optimal solutions can be used by the planner to select the route to be followed by the CTV when travelling from windmill to windmill during a maintenance sequence.</p><p>Tests on two of the islands have resulted in a relative improvement of around 65 to 70% on fuel consumption and distance in relation to a random sequence, while the third island has generated a relative gain of 69% in average weighed tardiness. The three islands combined have resulted in a set of Pareto optimal sequences for offshore windmill maintenance.</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100267"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49870020","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}

引用次数: 0

Optimal manufacturer's cost sharing ratio, shipping policy and production rate – A two-echelon supply chain 最优的制造商成本分担率、运输政策和生产率——两级供应链

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2022.100264

Avi Herbon, Israel David

{"title":"Optimal manufacturer's cost sharing ratio, shipping policy and production rate – A two-echelon supply chain","authors":"Avi Herbon, Israel David","doi":"10.1016/j.orp.2022.100264","DOIUrl":"10.1016/j.orp.2022.100264","url":null,"abstract":"<div><p>We analyze an integrated inventory supply chain and seek the optimal production lot, optimal production rate, and optimal (integer) number of shipments per production lot. An increasing need for higher operational efficiency, as well as growing competition among multiple products for a limited storage capacity, is driving retailers to require more frequent shipping. This imposes pressure on suppliers to share the shipping cost with retailers. The sharing ratio of the shipment cost has not previously been considered within the context of an integrated supply chain. Therefore, we contribute to the literature by investigating this entirely new parameter, assuming that the shipment cost is shared between a manufacturer and a retailer. We also consider a distributed supply chain in which each party optimizes its own cost. We analyze the problem of finding the optimal sharing ratio of the shipment cost for such a supply chain and show that there exists a specific choice of shipment cost-sharing ratio (set by the manufacturer) that results in total costs similar to those obtained in the integrated inventory model. We develop deterministic models that provides basic insights into the investigated problem. Through mathematical analysis of a nested-designs model, we provide intermediate results (which are of interest in their own right) as well as optimal analytical solutions. We show, through numerical examples, that in the scenario where each party optimizes its own cost, the manufacturer's shipment cost is a central control variable in the sense that it affects the costs of both parties.</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100264"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48545311","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}

引用次数: 1

Clustering and reference value for assessing influence in analytic network process without pairwise comparison matrices: Study of 17 real cases 不使用两两比较矩阵的网络分析过程的聚类及其影响评价的参考价值——17个实际案例的研究

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100275

Erik Schulze-González , Juan-Pascual Pastor-Ferrando , Pablo Aragonés-Beltrán

{"title":"Clustering and reference value for assessing influence in analytic network process without pairwise comparison matrices: Study of 17 real cases","authors":"Erik Schulze-González , Juan-Pascual Pastor-Ferrando , Pablo Aragonés-Beltrán","doi":"10.1016/j.orp.2023.100275","DOIUrl":"10.1016/j.orp.2023.100275","url":null,"abstract":"<div><p>The analytic network process (ANP) is a well-known multi-criteria decision method that uses pairwise comparison matrices to assess the influence among elements and clusters. This method requires the participation of experts who need to answer a large number of questions. A recent paper proposes using Decision-Making Trial and Evaluation (DEMATEL) scales in ANP to assess influences and suggests the possibility of grouping all elements into a single cluster. This rise the following questions that this paper seek to answer: if no comparison matrices are used in ANP, how similar are the results, whether clusters are used or not, to the original results with ANP using pairwise matrices? Why should or should not one or several groups be used in ANP? How much does the result change when considering multiple groups versus a single group? Does the variation of questions compensate for the variation of the results? How should the evaluation of influences and the use of the scale be approached depending on whether there are one or several groups? For this purpose, published cases solved with ANP have been reviewed and solved without comparison matrices, with the original clustering and with a single cluster, using four different models for each case study. The results show that clustering does influence the results. It should also be noted that the use of clustering helps to identify the elements of the decision problem. Additionally, this work includes the compilation of 17 cases matrices which can be used in further studies</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100275"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44059354","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}

引用次数: 0

A mathematical framework for regional hospital case mix planning and capacity appraisal 区域医院病例组合规划与能力评估的数学框架

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2022.100261

Robert L Burdett , Paul Corry , Prasad Yarlagadda , David Cook , Sean Birgan , Steven M McPhail

{"title":"A mathematical framework for regional hospital case mix planning and capacity appraisal","authors":"Robert L Burdett , Paul Corry , Prasad Yarlagadda , David Cook , Sean Birgan , Steven M McPhail","doi":"10.1016/j.orp.2022.100261","DOIUrl":"10.1016/j.orp.2022.100261","url":null,"abstract":"<div><p>This article considers current capacity issues in health care and the development of quantitative techniques to facilitate a high-level strategic assessment of hospital activity within a region. In providing that assessment, a variety of decision problems are foreseen, and we test the notion that it is useful to provide decision support for those. To achieve that support, several optimization models are developed and tested. In theory the presented models may help health care planners organise hospital resources and activity better, to treat more patients. The first model that we propose identifies a maximal caseload that meets the patient type proportions specified in a regional case mix imposed by a planner, executive or manager. The second model identifies how spatially distributed demand can best be met amongst the different hospitals, such that travel distance and unmet demand are minimised. The third model identifies how individual hospitals can jointly achieve their goals with the help of outsourcing. Each of the models has been implemented and tested on some demonstrative examples of a smaller nature, before a larger study is presented. Our case study demonstrates that appropriate data can be collected, and the proposed decision models can provide a rational appraisal of regional capacity and utilization.</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100261"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41452021","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}

引用次数: 3

An integer programming model for obtaining cyclic quasi-difference matrices 求循环拟差分矩阵的整数规划模型

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2022.100260

Luis Martínez , María Merino , Juan Manuel Montoya

引用次数: 0

RETRACTED: SIR model for the spread of COVID-19: A case study 撤稿:COVID-19传播的SIR模型:一个案例研究

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2022.100265

Ayoob Salimipour , Toktam Mehraban , Hevi Seerwan Ghafour , Noreen Izza Arshad , M.J. Ebadi

引用次数: 6

Bilevel integer linear models for ranking items and sets 排序项目和集合的双层整数线性模型

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100271

Martine Labbé , Mercedes Landete , Juan F. Monge

{"title":"Bilevel integer linear models for ranking items and sets","authors":"Martine Labbé , Mercedes Landete , Juan F. Monge","doi":"10.1016/j.orp.2023.100271","DOIUrl":"10.1016/j.orp.2023.100271","url":null,"abstract":"<div><p>Item and set orderings help with data management. Depending on the context, it is just as important to order a list of items (customers from different provinces, companies from different sectors, players from different teams) as it is to order a list of sets of these items (provinces, sectors, teams). It is evident that the order that is chosen for the items is not independent of the order that is chosen for the sets. It is possible that several set orders are sensible for the same item order and vice versa, that several item orders are sensible for the same set order. In this work, we propose a bilevel model to calculate an adequate order of items when an order of sets is available and another bilevel model to calculate an adequate order of sets when an order of items is available. In addition, it is shown how to reduce both bilevel models to single level models. Two illustrative computational studies are presented, the first with collected on 25 tennis players and ATP statistics and the second with Biomedical data. Both examples illustrate the good behavior of the models and the interest of their application in a real case scenario</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100271"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45718134","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}

引用次数: 0

The cost-benefit approach to an optimal charging scheme for an embryo storage service 胚胎储存服务最优收费方案的成本效益方法

IF 2.5 4区管理学

Operations Research Perspectives Pub Date : 2023-01-01 DOI: 10.1016/j.orp.2023.100281

Yael Lahav , Avi Herbon , Uriel Spiegel

{"title":"The cost-benefit approach to an optimal charging scheme for an embryo storage service","authors":"Yael Lahav , Avi Herbon , Uriel Spiegel","doi":"10.1016/j.orp.2023.100281","DOIUrl":"10.1016/j.orp.2023.100281","url":null,"abstract":"<div><p>Cryostorage of human embryos produced during the course of in vitro fertilization (IVF) treatment is an important issue for hospitals, governments and individuals who are facing fertility challenges. Embryo cryostorage is giving rise to increasing economic, ethical and legal concerns due to the increasing holding and operational costs of storage, the rise in the number of unused embryos, and the absence of economic incentives for hospitals to provide free cryostorage services. These issues may reduce the availability of storage services and encourage individuals to seek embryo donations from abroad with attendant medical risks and the possibility of illegal transactions. Given that both public and private healthcare institutions are increasingly motivated by economic factors, increasing the economic incentive to offer cryostorage has the potential to increase the provision of storage facilities. This paper proposes a nonlinear programming model to enable a hospital or other service provider to determine the optimal price it should charge for storage. The suggested pricing policy comprises three components; however, our analysis shows that an optimal solution can only include a maximum of two of these components. Finally, the paper introduces a numerical example as well as a real-data comparison among several providers to demonstrate the applicability and value of the proposed model.</p></div>","PeriodicalId":38055,"journal":{"name":"Operations Research Perspectives","volume":"10 ","pages":"Article 100281"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47281788","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}

引用次数: 0