However you don't have time for a "large,complex" network on the PE exam only a few nodes to deal with. Really it's just logic on that. Think it out and don't get ahead of yourself and it's easy. Then again I do alot of construction management in my job, it might just be my perspective but the CP problems that were on the exam were easy if you understand the basics. Some of the transpo surveying stuff threw me for a loop though. Make sure you know that stuff backwards and forward.CPM is critical path method of tracking and scheduling large, complex constuction projects. I don't have the CERM manual with me but it's towards the end.