Understanding and visualizing schedule deviations in construction projects using fault tree analysis
Understanding and visualizing schedule deviations in construction projects using fault tree analysis
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DOI：
10.1108/ecam-01-2020-0058
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发表时间：
2020-05
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影响因子：
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通讯作者：
Pei-Yuan Hsu;M. Aurisicchio;Panagiotis Angeloudis;J. Whyte
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作者：
Pei-Yuan Hsu;M. Aurisicchio;Panagiotis Angeloudis;J. Whyte
建筑项目的拖延既具有破坏性，又代价高昂。因此，需要确定和缓解造成时间表偏差的潜在原因。在以前的研究中，延迟因素主要是通过对建筑项目利益相关者的调查来确定的。这些延误因素通常是单独考虑的，并在同一层面提出，而没有明确审查其发生的顺序和相互关系。现实中，由于工程项目结构复杂、执行时间长，不符合进度往往是由一系列连锁事件引起的。了解这些联系不仅对尽量减少延误，而且对揭示利益攸关方的责任都很重要。为了明确说明延误因素之间的因果关系和逻辑关系，并进一步确定对整个项目进度延误具有最高意义的主要因素，故障树分析（FTA）方法，一种广泛应用于安全关键系统中的根本原因问题的方法，已被系统地严格执行。通过实例分析，利用故障树的树形结构，对最基本的延误因素进行了深入的分析。通过FTA的逻辑门功能，基于从现场事件日志、预制结构部件制造日志和与项目利益相关者的面对面访谈中收集的数据，进行了逻辑推理，以映射和可视化各种延迟因素之间的时间和因果关系。该分析确定了多个延误因素，并以严格的方式显示了这些因素如何从主要原因到最终的意外事件在逻辑上和时间上联系在一起。建议的FTA模型和传统的调查方法之间进行了比较，揭示了在建筑业的责任，包括事件日志和问题报告。结果表明，FTA模型提供了更丰富的信息和更清晰的网络延迟因素的图片。重要的是，FTA在揭示导致意外延误的事件之间的因果关系以及理解其在现实世界建筑项目中的突出地位方面的能力已经得到了清楚的展示。本研究展示了FTA在建筑领域的新应用，允许从一个新的角度理解和可视化延迟因素。新办法在寻找和消除拖延的根本原因以及澄清造成拖延的责任归属方面具有实际用途。
Delays in construction projects are both disruptive and expensive. Thus, potential causes of schedule deviation need to be identified and mitigated. In previous research, delay factors were predominantly identified through surveys administered to stakeholders in construction projects. Such delay factors are typically considered individually and presented at the same level without explicitly examining their sequence of occurrence and inter-relationships. In reality, owing to the complex structure of construction projects and long execution time, non-conformance to schedule occurs by a chain of cascading events. An understanding of these linkages is important not only for minimising the delays but also for revealing the liability of stakeholders. To explicitly illustrate the cause–effect and logical relationship between delay factors and further identify the primary factors which possess the highest significance toward the overall project schedule delay, the fault tree analysis (FTA) method, a widely implemented approach to root cause problems in safety-critical systems, has been systematically and rigorously executed.,Using a case study, the in-depth analysis for identifying the most fundamental delay factors has been fulfilled through FTA's tree structure. The logical deduction for mapping and visualising the chronological and cause–effect relationships between various delay factors has been conducted through the logical gate functions of FTA based on the data collected from the site event log, pre-fabricated structural component manufacturing log and face-to-face interview with project stakeholders.,The analysis identified multiple delay factors and showed how they are linked logically and chronologically from the primary causes to the ultimate undesired event in a rigorous manner. A comparison was performed between the proposed FTA model and the conventional investigation method for revealing the responsibility employed in the construction industry, consisting of event logs and problem reports. The results indicate that the FTA model provides richer information and a clearer picture of the network of delay factors. Importantly, the ability of FTA in revealing the causal connection between the events leading to the undesired delays and in comprehending their prominence in the real-world construction project has been clearly displayed.,This study demonstrates a new application of FTA in the construction sector allowing the delay factors to be understood and visualised from a new perspective. The new approach has practical use in finding and removing root causes of the delay, as well as clarifying the attribution of responsibility that causes the delay.