Percentage progress in "Collaboration Process modeling"

Hi gurus,

do you have same experience on "Process modeling" utilization?

I don't understand how the percentage of completion is manage (automatically, manually,... ?!?!).

Seems that I can only change manually the status (Open, in process, completed) in my own process. While in standard example I see the percentage completion but I don't understand how it is calculated.

KR

Image may be NSFW.
Clik here to view.