I have two questions that looks similar, with different answer.
I would like to have your comment on that

thanks guys

Pmstudy E4 Q115
During the Sequence Activities process, you realize that several tasks have conditional branches ( ex : a desigh update is only needed if the inspection detects errors). For this purpose, you may use Precedence diagramming method (PDM). Which is also referred as:
1) GERT
2) AOA
3) AON
4) Conditional diagramming methods