Pub Date : 2018-07-25DOI: 10.1108/S0276-897620180000019007
Ying Thaviphoke, Patrick T. Hester
Abstract During the 2004–2009 building boom, building materials in the United States were in short supply, in particular drywall. This shortage arose from the vast demand for repairing and rebuilding houses caused by several large hurricanes, namely, Katrina and Rita. The situation is complex because there are many stakeholders involved: manufacturers, suppliers, contractors, insurance companies, and homeowners. The problem begins with the suppliers (apart from the natural disasters that exacerbated the issue). The first question that should be asked is Why import drywall from overseas to use in the United States? and What regulations were in place regarding the usage of drywall, and so on. The next item that needs to be looked at is the homeowners. This is a very bad situation for them as they must evacuate their homes. Some of them had to move out and rent an apartment. Some of them sold their houses for less than half of what they paid for them. The problem is What can they do about the defective drywall in their houses? Further, Will they get their money back? If they do, Who is going to pay for it? or Where are they going to stay?, and so on. Since there are an estimated 100,000 homes in more than 20 states that were effected in this situation, this chapter will focus on the homeowners who live in Virginia, as it is the residence of the chapter’s primary author. It is very important to understand the homeowners’ problems and also their options to overcome this problem. Various attempts have been made to solve the situation but the problem is still there. The problem not only involves homeowner compensation but also a need to prevent this situation from happening in the future.
在2004-2009年的建筑热潮中，美国的建筑材料供不应求，尤其是干墙。这种短缺是由于几次大型飓风，即卡特里娜飓风和丽塔飓风造成了对房屋维修和重建的巨大需求。情况很复杂，因为涉及到许多利益相关者:制造商、供应商、承包商、保险公司和房主。问题从供应商开始(除了加剧问题的自然灾害)。应该问的第一个问题是为什么要从海外进口干墙在美国使用?关于干墙的使用有什么规定等等。下一个需要关注的是房主。这对他们来说是一个非常糟糕的情况，因为他们必须撤离家园。他们中的一些人不得不搬出去租了一套公寓。他们中的一些人以不到买入价一半的价格卖掉了他们的房子。问题是他们能做些什么来处理他们房子里有缺陷的干墙?此外，他们会拿回他们的钱吗?如果他们这么做了，谁来买单呢?或者Where are they going stay?等等。由于在20多个州估计有10万户家庭受到这种情况的影响，本章将重点关注居住在弗吉尼亚州的房主，因为这是本章主要作者的居住地。了解房主的问题以及他们克服这个问题的选择是非常重要的。已经做了各种尝试来解决这个问题，但问题仍然存在。这个问题不仅涉及房主补偿，还需要防止这种情况在未来发生。
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Pub Date : 2018-07-25DOI: 10.1108/S0276-897620180000019006
Bartosz Sawik
Abstract In this chapter, four bi-objective vehicle routing problems are considered. Weighted-sum approach optimization models are formulated with the use of mixed-integer programming. In presented optimization models, maximization of capacity of truck versus minimization of utilization of fuel, carbon emission, and production of noise are taken into account. The problems deal with real data for green logistics for routes crossing the Western Pyrenees in Navarre, Basque Country, and La Rioja, Spain. Heterogeneous fleet of trucks is considered. Different types of trucks have not only different capacities, but also require different amounts of fuel for operations. Consequently, the amount of carbon emission and noise vary as well. Modern logistic companies planning delivery routes must consider the trade-off between the financial and environmental aspects of transportation. Efficiency of delivery routes is impacted by truck size and the possibility of dividing long delivery routes into smaller ones. The results of computational experiments modeled after real data from a Spanish food distribution company are reported. Computational results based on formulated optimization models show some balance between fleet size, truck types, and utilization of fuel, carbon emission, and production of noise. As a result, the company could consider a mixture of trucks sizes and divided routes for smaller trucks. Analyses of obtained results could help logistics managers lead the initiative in environmental conservation by saving fuel and consequently minimizing pollution. The computational experiments were performed using the AMPL programming language and the CPLEX solver.
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Pub Date : 2016-04-27DOI: 10.1108/s0276-897620200000020013
D. Khezrimotlagh
In this article, the concepts of technical efficiency, efficiency, effectiveness and productivity are illustrated. It is discussed that when firms are not homogenous, the situation is the same as when each factor has a different unit of measurement from one firm to another, and there-fore, no meaningful discrimination can be expressed, unless a set of known weights are introduced to standardize data. A linear programming DEA model is used when a set of known weights are given to calculate the technical efficiency and efficiency of a set of homogenous DMUs with multiple input factors and output factors. A numerical example is also provided.
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Pub Date : 2014-08-21DOI: 10.1108/JM2-06-2014-0050
M. Beynon
{"title":"Applications of Management Science","authors":"M. Beynon","doi":"10.1108/JM2-06-2014-0050","DOIUrl":"https://doi.org/10.1108/JM2-06-2014-0050","url":null,"abstract":"","PeriodicalId":244858,"journal":{"name":"Applications of Management Science","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125991887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-07-19DOI: 10.1108/s0276-8976(2013)0000016020
R. Klimberg
{"title":"Applications of Management Science","authors":"R. Klimberg","doi":"10.1108/s0276-8976(2013)0000016020","DOIUrl":"https://doi.org/10.1108/s0276-8976(2013)0000016020","url":null,"abstract":"","PeriodicalId":244858,"journal":{"name":"Applications of Management Science","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123475193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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