Omega-international Journal of Management Science最新文献_第2页

Two-echelon collaborative many-to-many pickup and delivery problem for agricultural wholesale markets with workload balance 具有工作量平衡的农产品批发市场多对多协同取货和交货问题

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-08-06 DOI: 10.1016/j.omega.2024.103164

{"title":"Two-echelon collaborative many-to-many pickup and delivery problem for agricultural wholesale markets with workload balance","authors":"","doi":"10.1016/j.omega.2024.103164","DOIUrl":"10.1016/j.omega.2024.103164","url":null,"abstract":"<div><p>In the context of cooperation distribution among multiple wholesale markets, each customer can place orders with multiple agricultural wholesale markets, and each agricultural wholesale market can supply different products. To improve their distribution efficiency and avoid traffic congestion, cargoes need to be transshipped among collaborative distribution of different agricultural wholesale markets owing to their product heterogeneity. Each agricultural wholesale market undertakes the cost of completing the task for the reassigned customers of finding a balance among them, respectively. Fairness of allocation is achieved through workload balance and individual rationality constraints instead of monetary transfer payments. Aimed at the collaboration problem, a two-echelon collaborative many-to-many pickup and delivery problem with workload balance (2E-MPDP-WB) is presented in this study. A mixed-integer programming model for 2E-MPDP-WB is established, and a two-stage iterative algorithm combining branch-and-bound algorithm and adaptive large neighborhood search algorithm is proposed according to the problem structure. Some valid inequalities are also proposed. Finally, computational experiments show the correctness of the model and effectiveness of the algorithm, and sensitivity analysis is performed from four aspects, namely, costs before and after collaboration, workload balance, market geographical distribution, and demand mixing degree. The findings provide management insights for the collaborative distribution of multiple wholesale markets.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Robust online portfolio optimization with cash flows 利用现金流进行稳健的在线投资组合优化

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-08-02 DOI: 10.1016/j.omega.2024.103169

{"title":"Robust online portfolio optimization with cash flows","authors":"","doi":"10.1016/j.omega.2024.103169","DOIUrl":"10.1016/j.omega.2024.103169","url":null,"abstract":"<div><p>One fundamental issue in finance is portfolio selection, which seeks the best strategy for assigning capital among a group of assets. There has been growing interest in online portfolio selection where the investment strategy is frequently readjusted in a short time as new financial market data arrives constantly. Numerous effective algorithms have been extensively examined both in terms of theoretical analysis and empirical evaluation. Previous online portfolio selection algorithms that incorporate transaction costs are limited by the fact that they often approximate the transaction remainder factor instead of calculating it precisely. This could lead to suboptimal investment performance. To address this issue, we present an innovative method that considers transaction costs and resolves the accurate transaction remainder factor and the optimal portfolio allocation simultaneously for each period. In addition, we take into account the open-end fund, which permits constant cash inflows, and develop a framework for online portfolio selection. We also incorporate the uncertainty set to minimize the impact of the prediction error during the prediction process. Utilizing the framework presented in this innovative model, we develop a novel algorithm for online portfolio selection that incorporates transaction costs and continuous cash inflows with the objective of maximizing cumulative wealth. Numerical experiments show that the proposed algorithms are able to handle transaction costs and constant cash inflows effectively.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Modeling collaborative data service provision around an open source platform under uncertainty with stochastic provision games 用随机供应博弈模拟不确定情况下围绕开源平台提供的协作数据服务

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-31 DOI: 10.1016/j.omega.2024.103167

引用次数: 0

As a service or a product? A comparison of electric vehicle battery supply models 是服务还是产品？电动汽车电池供应模式比较

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-30 DOI: 10.1016/j.omega.2024.103166

{"title":"As a service or a product? A comparison of electric vehicle battery supply models","authors":"","doi":"10.1016/j.omega.2024.103166","DOIUrl":"10.1016/j.omega.2024.103166","url":null,"abstract":"<div><p>In response to the challenges posed by high costs and rapid degradation of electric vehicle (EV) batteries, Battery as a Service (BaaS) is introduced as a new EV battery supply model, alongside the traditional model of Battery as a Product (BaaP). Under this background, how to choose a battery supply model is a major strategic problem. Through game theory approach, we analyze and compare the BaaS and BaaP models under a durable goods framework. Firstly, we find that the BaaS model is more profitable than the BaaP model when battery cost or degradation rate is excessively high. The firm under BaaS can relieve cost pressures by selectively retaining used batteries and reducing the price threshold for consumers to acquire batteries. Secondly, through premature disposal of used batteries, a firm can endogenously determine the quality of battery service, making the BaaS model more profitable when battery cost or degradation rate is excessively low. Thirdly, we show that the firm under BaaS always benefits from the decrease of battery degradation rate. However, a lower battery degradation rate may reduce the firm’s profit under BaaP because of the cannibalization effect from the secondary market.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 multi-objective lot sizing procurement model for multi-period cold chain management including supplier and carrier selection 用于多期冷链管理的多目标批量采购模型，包括供应商和承运商选择

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-30 DOI: 10.1016/j.omega.2024.103165

{"title":"A multi-objective lot sizing procurement model for multi-period cold chain management including supplier and carrier selection","authors":"","doi":"10.1016/j.omega.2024.103165","DOIUrl":"10.1016/j.omega.2024.103165","url":null,"abstract":"<div><p>The rapid expansion of the cold chain market is a key supply chain trend, but its high energy consumption conflicts with low-carbon goals. To address this, the paper proposes a multi-objective lot sizing procurement (LSP) model for managing the procurement of perishable products in the cold chain. This model, constrained by limited inventory and transportation capacity, aims to optimize multi-period procurement plans and order allocation and minimize total costs and carbon emissions. The proposed multi-objective LSP model adopts a posteriori mode, which contributes to enhancing the model's applicability, especially in countries where carbon tax and trading systems are not fully developed. To enhance decision makers’ decision efficiency and preserve the diversity of the original Pareto solutions as much as possible, the K-means++ algorithm is employed to prune the original Pareto solution set, providing decision-makers with three representative solutions (cost priority, balanced, and carbon priority solutions). In addition, the paper conducts sensitivity analysis, stability experiments, and compares the multi-objective LSP model with the benchmark model (relaxed carbon emission constraints). Experiments show that the multi-objective LSP model quickly and stably provides decision-makers with lot sizing purchasing plans for numerical examples of different scales and effectively controls the total carbon footprint of the entire cold chain at a low cost.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Environmental sustainability under production competition with costly adjustments: An appraisal of firms’ behavior with regard to pollution dynamics 在有成本调整的生产竞争条件下的环境可持续性：企业在污染动态方面的行为评估

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-26 DOI: 10.1016/j.omega.2024.103163

{"title":"Environmental sustainability under production competition with costly adjustments: An appraisal of firms’ behavior with regard to pollution dynamics","authors":"","doi":"10.1016/j.omega.2024.103163","DOIUrl":"10.1016/j.omega.2024.103163","url":null,"abstract":"<div><p>The waning efficiency of natural pollution sinks and the predicted consequence of their irreversible transformation into pollution sources within the current century call into question the environmental sustainability of economic activity and, more specifically, its basic engine: horizontal competition. Among factors likely to cast doubt on the environmental sustainability of competition, competing firms’ approaches to pollution control deserve particular attention because myopic approaches that ignore pollution dynamics accelerate such transformations. Another potentially harmful factor is the cost of adjusting production, which can hinder firms’ ability to reduce their polluting emissions in a timely way. In the context of a Cournot market structure, we consider competing firms that incur a cost when adjusting production and are subject to pollution emission taxes. We analyze how production adjustment costs and firms’ choice of myopic or farsighted pollution control policies affect their competitiveness and the long-run sustainability of the environmental system. We show that competition is not compatible with environmental sustainability under a myopic pollution control policy when the maximum threshold of pollution absorption has already been exceeded. Myopic policies cannot neutralize history dependency, and extremely large production adjustment costs exacerbate the problem. In contrast, farsighted pollution control policies can eliminate history-dependency as long as the tax policy is not too restrictive, though they lead to a more polluted environment than myopic policies operating below the maximum absorption efficiency threshold.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Incentivization in centrally managed systems: Inconsistencies resolution 中央管理系统中的激励机制：解决不一致问题

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-26 DOI: 10.1016/j.omega.2024.103160

{"title":"Incentivization in centrally managed systems: Inconsistencies resolution","authors":"","doi":"10.1016/j.omega.2024.103160","DOIUrl":"10.1016/j.omega.2024.103160","url":null,"abstract":"<div><p>In centrally managed systems (CMSs), the need for incentivization systems at the local management level is crucial to optimize overall performance. Three alternative incentive systems have emerged within the centralized resource allocation (CRA) framework, aiming to measure the contribution of decision-making units (DMUs) in CMSs. However, we identify inconsistencies within these approaches and present them through illustrative examples. First, existing methods may struggle to effectively distinguish between CRA-efficient and CRA-inefficient DMUs, potentially resulting in inappropriate penalties or rewards for some the DMUs. Second, they may encounter difficulty in differentiating among CRA-efficient DMUs, especially when dealing with non-extreme DMUs or masked data within the dataset. Third, these methods may lack precision in measuring the impact of non-extreme CRA-efficient DMUs on overall performance. To address these limitations, we first highlight certain misconceptions related to individual efficiency within CMSs in the existing literature. Subsequently, we establish a fundamental characterization of individual efficient DMUs by outlining necessary and sufficient conditions for categorizing a DMU as CRA-efficient. For the second and third limitations, we adopt an endogenous perspective to quantify the influence of each CRA-efficient DMU. This involves calculating the maximum potential contribution of the DMU under evaluation in constructing the projection points of other DMUs. Furthermore, we propose a new method to handle masked data well in differentiating among CRA-efficient DMUs. We show the validity and applicability of our approaches using a real dataset.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0305048324001257/pdfft?md5=067f85a3ab18358ac6db7fe1996c43b6&pid=1-s2.0-S0305048324001257-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sharing service in healthcare systems: A recent survey 医疗系统共享服务：最新调查

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-24 DOI: 10.1016/j.omega.2024.103158

引用次数: 0

How to achieve targeted advertising with the e-commerce platform’s membership system? 如何利用电子商务平台的会员系统实现有针对性的广告宣传？

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-24 DOI: 10.1016/j.omega.2024.103156

{"title":"How to achieve targeted advertising with the e-commerce platform’s membership system?","authors":"","doi":"10.1016/j.omega.2024.103156","DOIUrl":"10.1016/j.omega.2024.103156","url":null,"abstract":"<div><p>Targeted advertising has been extensively researched and utilized, yet it remains a challenge for the majority of small and medium-sized enterprises (SMEs) to effectively implement. To tackle this issue, e-commerce platforms have established member-oriented marketing windows that attract high-quality merchants and consumers, creating new opportunities for SMEs. Unlike traditional mass advertising (MA) in public windows, SMEs can achieve targeted advertising (TA) marketing to member and non-member groups separately by joining the membership marketing system. Two typical advertising cost-bearing structures are included for the platform’s membership marketing system: the Platform-Bearing-Cost (PBC) and the Merchant-Bearing-Cost (MBC) mechanisms. The results show that, regardless of the cost-bearing mechanism, the narrow fee gap between the two marketing windows leads to a higher advertising level and advertising investment for members under TA. Moreover, we identify the criteria under which the merchant adopts TA: a limited cross-purchase for the members in public windows. Furthermore, a sufficiently low members’ cross-purchase coefficient in public windows contributes to a TA win–win outcome for the platform and the merchant. Nevertheless, the platform does not always benefit from the merchant’s adoption of TA, which has inspired us to refine the platform’s membership marketing system further. Two viable options are proposed for consideration: discount adjustment and product screening. The former, which is a strategic adjustment of member-only discounts, is designed to induce merchants to adopt the ad format that aligns with the platform’s expectations. The latter, which is a set of rigorous entry criteria, is intended to permit only those products that are in high demand to participate.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141778105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

An optimization model for determining cost-efficient maintenance policies for multi-component systems with economic and structural dependencies 为具有经济和结构依赖性的多组件系统确定具有成本效益的维护政策的优化模型

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-07-23 DOI: 10.1016/j.omega.2024.103162

{"title":"An optimization model for determining cost-efficient maintenance policies for multi-component systems with economic and structural dependencies","authors":"","doi":"10.1016/j.omega.2024.103162","DOIUrl":"10.1016/j.omega.2024.103162","url":null,"abstract":"<div><p>In most multi-component systems, the cost-efficiency of maintenance policies depends on technical structural dependencies. Motivated by the recognition that these dependencies must be accounted for in the development of optimal maintenance policies, we develop an optimization model to determine cost-efficient maintenance schedules for multi-component systems. Our main contribution is twofold. First, we introduce directed graphs as an expressive tool to represent the economic and structural dependencies of the system, including situations in which the maintenance of a given component may require other components to be disassembled or maintained. Second, we formulate a Markov Decision Process model, which is solved through the modified policy-iteration algorithm to determine the most cost-efficient policy. This policy indicates which maintenance actions consisting of disassembly and component replacement decisions are optimal when mandatory replacements must be made whenever the system fails, or the reliability of the system falls below a predefined reliability threshold. To our knowledge, this is the first model that provides optimal maintenance policies that comply with reliability requirements in the presence of constraints arising from technical structural dependencies. We illustrate the model with a realistic case study on the development of cost-efficient maintenance policies and show that its results compare favorably with heuristic maintenance policies.</p></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":null,"pages":null},"PeriodicalIF":6.7,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0305048324001270/pdfft?md5=bce25ab1996813025fcbf877ec758cfb&pid=1-s2.0-S0305048324001270-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141778106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0