Annals of Operations Research最新文献_第7页

A novel robust decomposition algorithm for a profit-oriented production routing problem with backordering, uncertain prices, and service level constraints 一种新颖的鲁棒分解算法，适用于具有反订、不确定价格和服务水平约束的利润导向型生产路径问题

IF 4.8 3区管理学

Annals of Operations Research Pub Date : 2024-08-13 DOI: 10.1007/s10479-024-06190-3

Tarik Zouadi, Kaoutar Chargui, Najlae Zhani, Vincent Charles, Raja Sreedharan V

{"title":"A novel robust decomposition algorithm for a profit-oriented production routing problem with backordering, uncertain prices, and service level constraints","authors":"Tarik Zouadi, Kaoutar Chargui, Najlae Zhani, Vincent Charles, Raja Sreedharan V","doi":"10.1007/s10479-024-06190-3","DOIUrl":"https://doi.org/10.1007/s10479-024-06190-3","url":null,"abstract":"The Production Routing Problem (PRP) seeks optimal production and distribution planning that minimises costs and fulfils customer orders. Yet, existing literature often overlooks the potential impact on profitability. Achieving optimal profit does not necessarily imply meeting all customer orders. The cost-to-profit ratio should be considered when serving customer orders, as there are circumstances where it might be more profitable to cancel or backorder certain orders. Thus, this paper proposes, for the first time, a novel extension of PRP that maximises profit where demand is price-sensitive and allows order cancellation and backorders under service level targets. From on-field observations, price is inherently subject to uncertainty; thus, we propose a robust mathematical model for the problem that optimises the worst-case profit. To solve the problem, the paper proposes a decomposition algorithm that splits the problem into a master problem and a set of subproblems, enhanced by valid inequalities and warming up lower bounds to alleviate the model complexity. Through a series of computational tests, we prove the ability of the proposed algorithm to tighten the optimality gaps and alleviate computational time. An additional economic study is conducted to investigate how parameter variation affects profit and how sensitive it is to service level targets.","PeriodicalId":8215,"journal":{"name":"Annals of Operations Research","volume":"209 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142197620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Should one (be allowed to) replace the Cippolini’s? 是否应该（允许）更换 Cippolini？

IF 4.8 3区管理学

Annals of Operations Research Pub Date : 2024-08-13 DOI: 10.1007/s10479-024-06206-y

Marcel Ausloos

引用次数: 0

Efficient allocation of load-balancing and differentiation tasks in tandem queue services 串联队列服务中负载平衡和区分任务的高效分配

IF 4.8 3区管理学

Annals of Operations Research Pub Date : 2024-08-12 DOI: 10.1007/s10479-024-06202-2

Mohammad Delasay, Mustafa Akan

{"title":"Efficient allocation of load-balancing and differentiation tasks in tandem queue services","authors":"Mohammad Delasay, Mustafa Akan","doi":"10.1007/s10479-024-06202-2","DOIUrl":"https://doi.org/10.1007/s10479-024-06202-2","url":null,"abstract":"Within service systems, tasks can encompass diverse functionalities. In a two-phase queuing model featuring two customer priority classes, our study discerns two distinct task functionalities executed by the first-phase server (referred to as the auxiliary server). These tasks aim to facilitate priority-based service by the second-phase server (referred to as the expert). Load-balancing tasks aim to alleviate the expert’s workload, while differentiation tasks seek to enhance accurate customer prioritization in the second phase by reducing misclassifications. With customers queuing for both the auxiliary server and the expert in tandem, our investigation focuses on determining the optimal allocation of the auxiliary server’s time between these load-balancing and differentiation tasks. Through queuing optimization, we aim to minimize customers’ expected total delay cost. In scenarios where the auxiliary server is allowed to perform only one task type (either load-balancing or differentiation), we delineate the optimal solutions based on specific functional forms dictating the server’s efficiency in executing each task type. These solutions strike a balance between excess phase capacities and the square root of marginal cost-to-saving ratios arising from each task type. Additionally, we partially characterize the optimal solution in scenarios permitting both load-balancing and differentiation tasks. Notably, under high system loads, executing load-balancing tasks proves more efficient than differentiation tasks. However, the relationship between the optimal task durations and system load showcases a non-monotonic pattern. As AI decision support products increasingly enable expert providers to delegate “routine” tasks to mid-level providers, our study sheds light on the efficient allocation of different tasks to different provider types to minimize delay costs in service systems.","PeriodicalId":8215,"journal":{"name":"Annals of Operations Research","volume":"20 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Portfolio optimization for sustainable investments 优化投资组合，促进可持续投资

IF 4.4 3区管理学

Annals of Operations Research Pub Date : 2024-08-12 DOI: 10.1007/s10479-024-06189-w

Armin Varmaz, Christian Fieberg, Thorsten Poddig

引用次数: 0

Efficiency and the core in NTU games in partition function form 分区函数形式的 NTU 游戏中的效率与核心

IF 4.8 3区管理学

Annals of Operations Research Pub Date : 2024-08-12 DOI: 10.1007/s10479-024-06192-1

Giovanna Bimonte, Luigi Senatore, Salvatore Tramontano

引用次数: 0

Longer healthy life, but for how many? A stochastic analysis of healthy lifespan inequality 健康长寿，但有多少人健康长寿？健康寿命不平等的随机分析

IF 4.8 3区管理学

Annals of Operations Research Pub Date : 2024-08-12 DOI: 10.1007/s10479-024-06203-1

Virginia Zarulli, Hal Caswell

{"title":"Longer healthy life, but for how many? A stochastic analysis of healthy lifespan inequality","authors":"Virginia Zarulli, Hal Caswell","doi":"10.1007/s10479-024-06203-1","DOIUrl":"https://doi.org/10.1007/s10479-024-06203-1","url":null,"abstract":"Over the past 150 years, life expectancy doubled and healthy life expectancy increased. Expectations reveal nothing about variability, so we present a stochastic analysis to investigate changes over time, age and gender of variation, among individuals, in healthy lifespan, for different levels of country income. To complement health-adjusted life expectancy (HALE) data from the Global Burden of Disease Study, we use a stochastic model to compute the standard deviation of healthy life (SDHL). The model is a finite-state absorbing Markov chain with rewards. It includes stochastic survival, mortality, and loss of good health status. An individual surviving from one age to the next gains, as a \"reward,\" a year of good health. This method provides all the moments of healthy longevity. The mean healthy longevity is exactly the HALE. As a measure of variation, here we focus on the standard deviation of healthy longevity. From 1990 to 2019, HALE increased, with greater increases at younger ages. At the same time, SDHL at younger ages decreased and at older ages increased. The most significant changes at birth occurred in low- and lower-middle-income countries. High- and upper-middle-income countries saw notable increases at old ages. Women generally have longer HALE and higher SDHL, but the overall HALE increase was greater for men. The reduction in SDHL over time suggests that more individuals benefit from increased longevity, particularly in low-income countries closing the gap with high-income countries. However, improvements in healthy survival at older ages appear unevenly distributed among individuals in high-income countries.","PeriodicalId":8215,"journal":{"name":"Annals of Operations Research","volume":"5 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Power utility maximization with expert opinions at fixed arrival times in a market with hidden Gaussian drift 在具有隐性高斯漂移的市场中，利用专家意见在固定到达时间实现电力效用最大化

IF 4.4 3区管理学

Annals of Operations Research Pub Date : 2024-08-11 DOI: 10.1007/s10479-024-06172-5

Abdelali Gabih, Hakam Kondakji, Ralf Wunderlich

引用次数: 0

Time-varying firm cash holding and economic policy uncertainty nexus: a quantile regression approach 时变企业现金持有量与经济政策不确定性的关系：一种量回归方法

IF 4.4 3区管理学

Annals of Operations Research Pub Date : 2024-08-09 DOI: 10.1007/s10479-024-06176-1

Christos Floros, Emilios Galariotis, Konstantinos Gkillas, Efstathios Magerakis, Constantin Zopounidis

{"title":"Time-varying firm cash holding and economic policy uncertainty nexus: a quantile regression approach","authors":"Christos Floros, Emilios Galariotis, Konstantinos Gkillas, Efstathios Magerakis, Constantin Zopounidis","doi":"10.1007/s10479-024-06176-1","DOIUrl":"10.1007/s10479-024-06176-1","url":null,"abstract":"<div>This paper examines the time-varying nature of various decisive factors on cash holding decisions. First, we revisit the issue of cash holding determinants of U.S. corporations and argue that firm cash holding predictability is time-varying. To this end, this research proposes a novel empirical framework that builds on the impact of business cycles on firm cash holding’s predictability. Using a three-stage empirical analysis, we also posit that the conventional argument on the EPU-CASH relationship is dependent on the time-varying market structure. Earlier studies have shown that economic policy uncertainty may increase the propensity of cash holding at the firm level. To estimate the theoretical assumption and capture different dynamic relationships, we convert monthly EPU data to annual and develop a cash quantile regression model including several financial characteristics. Employing a large sample of U.S. non-financial firms and non-utilities, we initially estimate 6-year rolling fixed window quantile regressions during the 1970–2016 period. The resulting series of beta estimates are regressed on economic policy uncertainty. The main results confirm the time-varying nature of determinants related to corporate liquidity management. Our findings add a new dimension to the existing literature and therefore be important to the market participants for portfolio allocation in the developed markets. Overall, the new methodology presented in this study contributes to the field of operational research by providing a robust approach to analyze policy uncertainty and its impact on cash management.</div>","PeriodicalId":8215,"journal":{"name":"Annals of Operations Research","volume":"341 2-3","pages":"859 - 895"},"PeriodicalIF":4.4,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Correction: Correlation and price spillover effects among green assets 更正：绿色资产之间的相关性和价格溢出效应

IF 4.4 3区管理学

Annals of Operations Research Pub Date : 2024-08-08 DOI: 10.1007/s10479-024-06185-0

Aviral Kumar Tiwari, Satish Kumar, Emmanuel Joel Aikins Abakah

引用次数: 0

Author Correction: Enabling business sustainability for stock market data using machine learning and deep learning approaches 作者更正：利用机器学习和深度学习方法实现股市数据的商业可持续性

IF 4.4 3区管理学

Annals of Operations Research Pub Date : 2024-08-08 DOI: 10.1007/s10479-024-06181-4

S. Divyashree, Christy Jackson Joshua, Abdul Quadir Md, Senthilkumar Mohan, A. Sheik Abdullah, Ummul Hanan Mohamad, Nisreen Innab, Ali Ahmadian

引用次数: 0