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Understanding the Key Risks Affecting Cost and Schedule Performance of Modular Construction Projects

机译：了解影响模块化建设项目成本和调度性能的关键风险

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摘要

Modular construction has been documented to be superior over traditional construction methods in terms of schedule, quality, predictability, and other project objectives. However, the lack of understanding and proper management of unique modular risks have been documented to result in suboptimal performance in modular construction projects. Although many previous research efforts have focused on the barriers and drivers related to the adoption of modular construction in the industry, no previous research work has addressed the key risks impacting cost and schedule of modular construction projects. This paper fills this knowledge gap. The authors utilized a multistep research methodology. First, a survey was distributed to and answered by 48 construction professionals to examine the effects of 50 modular risk factors that were identified based on a systematic literature review in a previous study. Second, a Cronbach's alpha test was conducted to check survey validity and reliability. Finally, Kendall's concordance analysis, one-way ANOVA, and Kruskal-Wallis tests were conducted to examine the agreement of responses within each as well as among the various stakeholders of modular construction projects. Results showed that the most critical factors affecting both cost and schedule of modular projects are (1) shortage of skilled and experienced laborers, (2) late design changes, (3) poor site attributes and logistics, (4) unsuitability of design for modularization, (5) contractual risks and disputes, (6) lack of adequate collaboration and coordination, (7) challenges related to tolerances and interfaces, and (8) poor construction activity sequencing. This study adds to the body of knowledge by helping practitioners to better understand the key risk factors that should be considered to enhance the performance of their modular construction projects. The outcomes provide insight into the alignment of stakeholders on the different risk factors affecting cost and schedule in modular construction projects. This should help practitioners to establish mitigation plans during the early stages of a project. (C) 2021 American Society of Civil Engineers.
机译：在时间表，质量，可预测性和其他项目目标方面，模块化建设已被记录在传统的施工方法上。但是，已经记录了缺乏理解和适当管理独特的模块风险，以导致模块化建设项目中的次优性能。虽然以前的许多研究努力专注于与行业采用模块化建设的障碍和司机，但之前的研究工作已经解决了模块化建设项目的影响力和计划的关键风险。本文填补了这种知识差距。作者利用了多学期的研究方法。首先，通过48个施工专业人员分发了一项调查，以检查基于先前研究中的系统文献综述所识别的50个模块化风险因素的影响。其次，进行了Cronbach的alpha测试以检查调查有效性和可靠性。最后，肯德尔的一致性分析，单向ANOVA和Kruskal-Wallis测试是进行的，以检查各种答复协议，以及模块化建设项目的各种利益攸关方之间。结果表明，影响模块化项目的成本和时间表的最关键因素是（1）熟练和经验丰富的劳动者的短缺，（2）晚期设计变化，（3）场地属性和物流差，（4）模块化的不适合设计（5）合同风险和纠纷，（6）缺乏充足的合作与协调，（7）与宽容和界面有关的挑战，（8）施工差的施工活动序列。本研究通过帮助从业者更好地了解应该被视为加强其模块化建设项目的性能的关键风险因素来增加知识体系。结果提供了对利益相关者对抗影响成本的不同风险因素的洞察，并在模块化建设项目中对影响成本和时间表的危险因素进行了识别。这应该有助于从业人员在项目的早期阶段建立缓解计划。 （c）2021年美国土木工程师协会。

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  • 来源
    《Journal of Management in Engineering》 |2021年第4期|04021023.1-04021023.14|共14页
  • 作者

    Abdul Nabi Mohamad; El-adaway Islam H.;

  • 作者单位

    Missouri Univ Sci & Technol Dept Civil Architectural & Environm Engn Rolla MO 65409 USA;

    Missouri Univ Sci & Technol Construct Engn & Management Dept Civil Architectural & Environm Engn Rolla MO 65409 USA|Missouri Univ Sci & Technol Civil Engn Dept Civil Architectural & Environm Engn Rolla MO 65409 USA|Missouri Univ Sci & Technol Missouri Consortium Construct Innovat Dept Civil Architectural & Environm Engn Rolla MO 65409 USA|Missouri Univ Sci & Technol Dept Engn Management & Syst Engn Rolla MO 65409 USA;

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