Combined Location Models

早期的选址模型假设设施可以毫不迟疑地为所有客户提供服务，它们永远不会失败，库存和营销的决策可以单独做出。拟议的研究旨在放松这些假设，并调查组合区位模型的四个主要方向： 1.可靠性选址模型：由于多种原因，设施可能并确实会发生故障。这项研究试图更好地理解故障是如何影响最佳选址决策的。我建议5个方向，在这些方向上，我们放松对该领域先前工作的一些强有力的假设。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.库存选址模型：近年来，通过开发库存选址模型，努力实现战略和战术决策的一体化。主要决策涉及找到设施的数量、它们的位置和要订购的库存量。我建议6个研究方向，展示联合库存和选址决策的优势。 3.排队选址模型：由于容量有限和随机的需求和服务，设施可能拥堵，客户可能需要等待服务。重点研究了两类排队选址模型：(I)弹性需求选址模型和(Ii)联合选址定价模型。我建议8个方向，包括通过放松一些限制性假设来扩展现有的模型，以及开发新的模型来帮助管理者提高服务质量。 4.营销选址模式：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。在这个全新的研究领域，我建议三个方向。

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.