TOPIC: PMP Exam calc of ES, EF, LS, LF, Float.

Based on PM PrepCast and Formula Study Guide, here are the fomulas:

EF = ES + Dur - 1
ES = EF of prev (largest) + 1
LF = LS of succ (smallest) - 1
LS = LF - Dur + 1
Float = LS - ES = LF - EF

However, it was mentioned that there are other calculation methods, which where the Start Day is Zero.

I have searched and found this:

www.projectlearning.net/pdf/X2_1.pdf

As we can see from the PDF, the formulas are similar, but they start at Day Zero, and there is no +1 nor -1.

What is expected on PMP Exam ? Does it make any difference ?

Tarek.

Both methods give the same result. No difference between the two, and the exam does not care.

There will be difference if in exam required to calculate say, LF of a given activity on the Network Diagram.

But, there will be no differece to calculate Total Float and Find the Cretical Path.

Tarek.