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： q3P3euK3  
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.
vo(?[[  
请问对这两个的专业术语如何理解。谢谢！ p$%h!.~99T