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首页> 外文期刊>Transport policy >Reasons for contract changes in implementing Dutch transportation infrastructure projects: An empirical exploration
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Reasons for contract changes in implementing Dutch transportation infrastructure projects: An empirical exploration

机译：实施荷兰交通基础设施项目时合同变更的原因：实证探索

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摘要

An important contributor to cost overruns of infrastructure projects is contract changes after the construction contract has been concluded. Using mainly descriptive statistics and non-parametric tests, real project data were analyzed from forty-five Dutch transportation infrastructure projects with a total construction contract value of over 8.5 billion. First it was explored if we could find evidence for the presumption that contractors bid low on contracts to recover the loss of bid profit by claiming contract change costs in the project implementation. We conclude that we could not find evidence for the opportunistic behavior of contractors. Second, the different sizes and reasons for the contract changes were explored. We conclude that: scope changes are the most significant reason for contract changes, followed by technical necessities; smaller projects tend to have higher relative contract change costs; and contract changes due to omissions in the contract are more present in smaller projects than in larger projects. The results of the analysis suggest among.other things that policymakers and planners should pay more attention to flexible contracting, and to the contract management of smaller projects. (C) 2014 Elsevier Ltd. All rights reserved.
机译：基础设施项目成本超支的一个重要原因是建筑合同签订后的合同变更。主要使用描述性统计数据和非参数测试，对来自45个荷兰运输基础设施项目的实际项目数据进行了分析，这些项目的总建筑合同价值超过85亿美元。首先，探讨了我们是否可以找到这样的假设证据，即承包商在项目实施中通过要求合同变更成本来对合同出价低以弥补投标利润的损失。我们得出的结论是，我们找不到承包商的机会主义行为的证据。其次，探讨了合同变更的不同规模和原因。我们得出以下结论：范围变更是合同变更的最重要原因，其次是技术必要性；较小的项目往往具有较高的相对合同变更成本；而且由于合同遗漏而导致的合同变更在较小的项目中比在较大的项目中更常见。分析的结果表明，决策者和计划者还应该更加注意灵活的合同以及较小项目的合同管理。 （C）2014 Elsevier Ltd.保留所有权利。

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