Are you talking about the picture (visualization of the reason tree) on slide 32?
If so, this is not done in AF but just a picture added in front of PI System explorer. It illustrates the AF Structure and at the same time the logic between different failure points. I expect there to be some sensor data being available as Attributes on the AF Elements. The data allows to evaluate if there is a failure. I suggest using Asset Analytics for this kind of evaluation and to store the result in a new Attribute. PI Notifications can than be used to trigger an email informing about the fault.