在工程施工过程中,常常会发生一些不可预见的干扰事件使预定的施工方案不能顺利进行,施工计划受到干扰,造成工期延误。工期延误通常是由于施工现场作业条件、周围环境、气侯的变化、设计变更、业主的主观因素或工程量增加引起施工程序的变动,致使承包商在工期延长、延误或加速 In the process of project construction, some unforeseen interference events often occur that make the planned construction plan not be carried out smoothly. The construction plan is disturbed and the construction period is delayed. Construction delays are usually caused by construction process changes in the construction site conditions, changes in the surrounding environment, climate, design changes, the subjective factors of the owners or an increase in the amount of construction caused by changes in construction procedures, resulting in extension of the contractor, delay or acceleration