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Integrating design freeze in to large-scale construction projects in Sri Lanka

机译：将设计冻结冻结在斯里兰卡的大型建筑项目中

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Change is inevitable in most construction projects due to uniqueness of projects and limited resources. Previous studies revealed that design changes are accountable for 78% of the total cost deviation in construction projects. Design Freeze (DF) is one method used during design development stage to mitigate the risks associated with change. This organizes and complies the design process, control changes, and force the completion of design stages on time. However, this is a novel concept to the construction industry. Hence, this study focused on investigating the DF concept in terms of its adoptability in large-scale construction projects to enhance project performance by minimizing changes. The present study adopted a mixed approach where the questionnaire survey and expert interviews helped to derive findings. Questionnaire survey was administered to hundred (100) industry professionals with a response rate of 87%. Further, an expert opinion survey was performed with nine subject matter experts. The quantitative data were analysed using SPSS software, whereas code based content analysis using Nvivo version 11 supported to analyse qualitative data. The findings revealed that the client and the consultant are the major parties causing design changes. Selecting an experienced and qualified design team, permitting adequate time frame for design development, and etc. are the significant factors to be considered when implementing a DF. Furthermore, the study identified the impracticability of adopting a 100% design freeze in large-scale construction projects, and the interviewees accepted the concept of partial design freeze by identifying strategies targeted to maximize the design percentage.
机译：由于项目的独特性和资源有限的唯一性，更改在大多数建筑项目中是不可避免的。以前的研究表明，设计变更对建筑项目总成本偏差的78％负责。设计冻结（DF）是在设计开发阶段使用的一种方法，以减轻与变革相关的风险。这组织并符合设计过程，控制变化，并按时强制完成设计阶段。然而，这是建筑业的新颖概念。因此，本研究重点是在大规模建设项目中的可持续性方面调查DF概念，以通过最大限度地减少变化来提高项目性能。本研究采用了一种混合方法，其中调查问卷调查和专家访谈有助于导出结果。调查问卷调查由百分之百（100）个行业专业人员进行，回复率为87 ％。此外，专家舆论调查是用九个主题专家进行的。使用SPSS软件分析定量数据，而基于基于代码的内容分析，使用NVIVO版本11支持分析定性数据。这些研究结果透露，客户和顾问是造成设计变更的主要缔约方。选择经验丰富的设计团队，允许适当的设计开发时间框架等是实施DF时要考虑的重要因素。此外，该研究确定了采用100 ％设计冻结在大型建设项目中的不切实性，受访者通过识别旨在最大化设计百分比的策略来接受部分设计冻结的概念。

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