ABSTRACT Prediction of construction cost and life-cycle cost through preliminary estimate is very important for the economic decision-making in the early phase of building projects. However, the conventional preliminary estimate has a high error range and low reliability because it relies only on the basic information of projects. In addition, the consideration of the life-cycle cost of the building is insufficient, causing problems such as budget shortage, inaccurate budgeting, and life-cycle cost increase. In this study, we propose a method of preliminary estimate based on BIM below the level of detail 2 and actual construction cost data to support the decision-making in the early design phase. To verify the proposed method, a web-based prototype was implemented and applied to three test cases. The range of error rate for three test cases was 1.93–7.16% (average error rate: 5.18%). It satisfies the criteria (−30% ~ +50%) of the “American Association of Cost Engineering”. As a result, the feasibility of the proposed model was validated. It is expected to be utilized as useful information in the decision-making occurring in the early design phase, and this allows for a rapid economic review of the design alternatives, a reduced LCC, and a shortened decision-making time.

中文翻译：

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基于BIM的考虑生命周期成本的前期设计前期决策估算方法

摘要 通过初步估算对建设成本和全生命周期成本进行预测，对于建设项目前期的经济决策具有重要意义。然而，传统的初步估算仅依赖于项目的基本信息，误差范围大，可靠性低。此外，对建筑物全生命周期成本的考虑不足，造成预算不足、预算不准确、全生命周期成本增加等问题。在本研究中，我们提出了一种基于 BIM 低于详细级别 2 和实际建筑成本数据的初步估算方法，以支持早期设计阶段的决策。为了验证所提出的方法，实现了一个基于 Web 的原型并将其应用于三个测试用例。三个测试用例的错误率范围为 1。93–7.16%（平均错误率：5.18%）。满足“美国造价工程协会”的标准（-30%~+50%）。从而验证了所提出模型的可行性。它有望在早期设计阶段的决策中用作有用的信息，这样可以快速对设计备选方案进行经济审查，减少 LCC，并缩短决策时间。