工程项目建设前期工作主要包括项目建议书阶段、可行性研究阶段、项目决策阶段、设计阶段、建设准备阶段。根据有关资料分析,施工阶段、竣工验收阶段及后评价阶段对工程造价的影响约为12%,而影响工程造价 The pre-construction work of the project mainly includes the project proposal stage, the feasibility study stage, the project decision-making stage, the design stage and the construction preparation stage. According to the relevant data analysis, the impact of the construction phase, the completion acceptance phase and the post-evaluation phase on the project cost is about 12%, which affects the construction cost