Work Front Graph是什么图 [复制链接]

在一个合同中进度控制部分出现了Work Front Graph和Agreed Production cycle，其原文如下： 6x h:/j3  
The time difference between the Overall work front graph and the overall progress curve is by agreement deemed to be equal to the Agreed Production cycle plus the float. @ezH'y-v  
请问对这两个的专业术语如何理解。谢谢！ 3nT^?;-