How to know the progress of whole project is delayed?

[Anita Chen]

Hi All,

I'm going to managing a new project for Waterfall. I would like to know if my project is delayed or not.

However, if I don't have the "estimated start date", "estimated finish date" and "estimated completed percentage" columns to compare with "start date", "finish date", "Real progress percentage", how to know that my project is delayed? How to know  what percentage is delayed.

For example, the "estimated completed percentage" right now should be 75%, but the "Real progress percentage" right now is 50％. So PM will know that there is a big delay and need to deal with it asap.

Can anyone share how he/she manage the project progress for Waterfall?