回帖：dallen:if one complex activity have some steps,  and the steps have no logic each other, how can i calculation the duration? (2017-11-22 17:27) 
No，you can not calculate the duration with the steps method.
You need record the duration yourself.
By the way, using steps you can calculate the complete percentage more acurately.
and i suggest u try it urself in the software. Truth comes from practice