The characteristics of a project that makes it hard to understand, predict, and manage its general behavior despite the availability of required information relating to the project dynamics is referred to as project complexity. A good knowledge of project complexity at the construction phase of a project, as well as a well thought out plan to manage complexity will determine how proficiently construction projects are planned, managed, and executed in an environmentally friendly manner. The level of complexity of construction projects to a large extent determines the performance or otherwise of the projects with regards to achieving specific environmental standards. At construction sites, the effects of adopting green site practices on environmental performance is largely dependent on the level of complexity inherent in the project’s construction processes. This study investigates the moderating effects of project complexity on the relationship between various green construction site practices and environmental performance of construction projects. A survey was conducted on class A contractors in Nigeria and 168 usable responses were received. The data were analyzed using the partial least squares structural equation modelling technique. The results show that project complexity moderates the relationship between waste management and environmental performance, and the relationship between materials management and environmental performance. But project complexity does not moderate the relationship between energy management and environmental performance. The study provides important theoretical and practical information for construction managers in understanding the dynamics involved in managing of projects with different degrees of complexity, while adopting certain green site practices with the aim of delivering projects with high degree of environmental performance.

中文翻译：

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绿地实践和环境绩效：项目复杂性如何缓和关系

尽管可获得与项目动态相关的必需信息，但仍难以理解，预测和管理其一般行为的项目特征称为项目复杂性。在项目建设阶段对项目复杂性的充分了解以及精心设计的复杂性管理计划将决定如何以环保的方式计划，管理和执行建设项目。建设项目的复杂程度在很大程度上决定了项目在实现特定环境标准方面的绩效。在建筑工地 采用绿色场所实践对环境绩效的影响在很大程度上取决于项目建设过程中固有的复杂程度。本研究调查了项目复杂性对各种绿色建筑工地实践与建筑项目环境绩效之间关系的调节作用。在尼日利亚对A级承包商进行了一项调查，收到了168份可用答复。使用偏最小二乘结构方程建模技术分析数据。结果表明，项目复杂性缓解了废物管理与环境绩效之间的关系，以及材料管理与环境绩效之间的关系。但是项目的复杂性并不能缓解能源管理与环境绩效之间的关系。该研究为建筑管理者提供了重要的理论和实践信息，帮助他们理解复杂程度不同的项目管理所涉及的动态，同时采用某些绿色场地实践以交付具有较高环境绩效的项目。