Overall vs Duration on Table Definition Dialog Box

Hello,

Applying Overall Progress to the summary tasks in the project means that Powerproject will calculate the completion % of the summary from the individual completion % of its subordinate tasks

you can refer to the following page to better understand:

https://help.elecosoft.com/powerproject/english/15.0.01/Content/HTML_Topics/Conceptual/Progress/Expanded_summary/Progoverall.htm?Highlight=overall%20progress

Alexandre

Thanks lot for your explanation

Overall Progress :  You may wish to enter and display progress as an overall percentage complete, a measurement that is independent of the duration of a task. For example, if a task is planned to take 10 days and 5 days have elapsed but only 20% of the task work has been done, you can record that the task is 20% overall complete, even though it is 50% complete when progress is viewed as a percentage of the task duration. Changes to the actual or remaining duration will not change the overall percentage complete value. Calculating progress in this way is most useful if you do not assign resources to your tasks. This progress is similar to P6 Physical Progress.

Sources : Power project help

Thanks lot