Schedule Calculations
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There are a range of options for the calculation of dates and float in a CPM network.
I’ve just finished a draft White Paper focusing on the basic calculations and would appreciate comments on the correctness of the calculations and the methodology adopted. The aim is to produce a definitive document that is generally agreed.
You can download the paper from http://www.mosaicprojects.com.au/PDF/Schedule_Calculations.pdf All comments gratefully appreciated.
1 reply
Oldest first- 0Vladimir Liberzon ·
Hi Patrick, the paper is very
Hi Patrick,
the paper is very useful for understanding CPM calculations.
Not everything is applicable to Spider Project - we use additional types of activities, links, and lags. Besides, we don't approve negative floats.
I think that you shall reconsider adding 1 to activity dates.
If an activitiy starts in the middle of th day it is not necessary. I would suggest to write that 24:00 of the previous day and 0:00 of the next day are the same. And set the rule that activity always finishes at 24:00 and starts at 0:00. With this rule the problem does not exist. Actually activity duration may be measured in seconds.
Best Regards,
Vladimir
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