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The principal factors affecting construction project overhead expenses: an exploratory factor analysis approach

机译：影响建设项目间接费用的主要因素：探索性因素分析法

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摘要

Estimation is the first step in the project development process. Information technology provides an efficient platform for estimators to obtain quotations and specifications for their bid estimates. However, in practice, project overhead estimation relies heavily on the professional judgement and intuition of the estimators. This reduces the overall accuracy and reliability of the bid and a better understanding of the factors affecting project overheads is fundamental before any improved estimating methods can be devised. Unfortunately, the published literature on this topic is very limited. Using exploratory factor analysis, we aim to bridge the current knowledge gap by highlighting the principal factors affecting project overheads. Questionnaires detailing 27 variables were sent to quantity surveying managers of large contractors in Hong Kong. Seventy-nine valid responses were analysed by exploratory factor analysis. From the results, eight factors were extracted with their latent properties identified with reference to the expert opinions collected from telephone interviews. The findings clarify some misconceptions about the factors affecting project overheads and provide useful evidence for practitioners and researchers to understand project overheads. Estimators who address the identified factors when assessing future project overhead costs can improve the accuracy of their cost estimates and project budgets.
机译：估算是项目开发过程中的第一步。信息技术为估算员提供了一个有效的平台，以获取其投标估算的报价和规格。但是，实际上，项目间接费用估算在很大程度上取决于估算人员的专业判断和直觉。这降低了投标的总体准确性和可靠性，并且在可以设计出任何改进的估算方法之前，更好地理解影响项目间接费用的因素至关重要。不幸的是，有关该主题的已发表文献非常有限。通过探索性因素分析，我们旨在通过突出影响项目间接费用的主要因素来弥合当前的知识差距。将详细列出27个变量的问卷发送给了香港大型承包商的数量测量经理。通过探索性因子分析，分析了79份有效应答。从结果中，提取了八个因素，并根据从电话采访中收集的专家意见确定了它们的潜在属性。该发现澄清了对影响项目间接费用的因素的一些误解，并为从业人员和研究人员了解项目间接费用提供了有用的证据。在评估将来的项目间接费用时解决确定的因素的估算者可以提高其成本估算和项目预算的准确性。

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