英语翻译

英语翻译
Although the subcontractors’ fulfillment of the commitments acquired in the planning meeting was measured by the weekly PPC indicator of the Last Planner system,it was difficult to visualize the improvement.
其中PPC=percent plan complete,
Last Planner 貌似是一种评估的方法什么的,这篇文章主要讲的是建筑业中的承建商和分包商之间的关系.
能翻译好的,说道做到!