Combined Location Models

早期的选址模型假设设施可以毫不延迟地为所有客户提供服务，它们永远不会失败，库存和营销决策可以单独做出。本研究旨在放宽这些假设，并研究组合位置模型的4个主要方向： 1. 可靠性-位置模型：设施可能并且确实由于许多原因而失效。本研究旨在更好地了解故障如何影响最佳选址决策。 我建议5个方向，我们放松一些强有力的假设，以前的工作在该地区。 这项工作将协助管理人员就建造新设施、提高现有设施的可靠性和改进信息系统作出预算分配决定。 2. 库存-位置模型：近年来，通过发展库存-位置模型，已经做出了很大的努力来实现战略和战术决策的集成。主要的决策包括找到设施的数量，它们的位置和要订购的库存量。我建议6个研究方向，显示联合库存和位置决策的优势。 3. 定位模型：由于容量有限以及需求和服务的随机性，设施可能会拥挤，客户可能不得不等待服务。我们专注于两种类型的租赁位置模型：（i）弹性需求的位置模型和（ii）联合位置定价模型。本文提出了8个方向，包括通过放宽一些限制性假设来扩展现有模型，以及开发新的模型来帮助管理者提高服务质量。 4. 市场定位模型：创新的新产品比过去更频繁地推向市场，现有产品的生命周期越来越短。新产品或服务的销售受到顾客对产品或服务的感知质量、营销努力和到设施的旅行距离的影响。我在这个全新的研究领域提出了三个方向。

Early location models assumed that facilities can serve all customers without delay, that they never fail and that decisions on inventory and marketing can be made separately. The proposed research aims at relaxing these assumptions and to investigate 4 major directions of combined location models: 1. Reliability-Location Models: Facilities can and do fail due to many reasons. This research seeks to gain a better understanding of how failures affect the optimal location decisions. I suggest 5 directions where we relax some of the strong assumptions of prior work in the area. The work will assist managers in making budget allocation decisions on constructing new facilities, on improving reliability of existing ones and on improving the information system. 2. Inventory-Location Models: In recent years, there have been great efforts to achieve integration of strategic and tactical decisions through the development of inventory-location models. The main decisions involve finding the number of facilities, their locations and the amount of inventory to order. I suggest 6 research directions showing the advantages of making joint inventory and location decisions. 3. Queuing-Location Models: Due to limited capacity and random demand and service, facilities may be congested and customers may have to wait for service. We focus on two types of queuing-location models: (i) Location models with elastic demand and (ii) joint location-pricing models. I suggest 8 directions including extension of existing models by relaxing some limiting assumptions and developing new models that can help managers to improve the quality of service. 4. Marketing-Location Models: Innovative new products are introduced to the market more often than in the past and the lifecycles of the existing products keep getting shorter. Sales of new products or services are affected by the perceived quality of the product or service formed by customers, the marketing efforts and the travel distance to the facilities. I suggest 3 directions in this completely new research area.