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WBS level duration in PM5/6

2 replies [Last post]
Mon, 2008-03-31 12:16
Alexandre Faulx-B...
User offline. Last seen 2 years 30 weeks ago. Offline
Joined: 20 Jan 2003
Posts: 1355
Groups: Petro-Chem / Oil & Gas, TILOS
Hello Planners
Who explain the following discrepancies between the original duration of a sequence of tasks and of the corresponding WBS level?
I have scheduled 4 tasks on line with Finish to Start links, no delays; the total duration of the sequence is 55 days, starting the 1st of September 2007, and finishing the 18th of November; the working week is Sat - Wed and I have entered 2 holidays: Oct 13 and 14.
A) Why does PM5 / PM6 show a 54 day duration for the WBS level? I have checked the number of working days between Sept 1 in the morning and Nov 18 in the evening: 55
B) Why does PM5 change the WBS level duration to 52 when I delete the additional days off, and not when I only delete Oct 13?
I have carefully checked that both the project and the tasks are using the same calendar; this calendar is not PM5’s default calendar; I have checked that the Admin and User Preferences Units are according to the calendar, i.e. one week = 40 hours
I do have the same problem when using PM5 and PM6 on several PCs, and in several projects
Thanks for your help,
Alexandre
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Replies

Wed, 2008-04-02 07:54
#1
David Kelly
User offline. Last seen 2 years 17 weeks ago. Offline
Joined: 19 Oct 2004
Posts: 630
Groups: Petro-Chem / Oil & Gas
The duration shown in a WBS activity is based on the WBS activity’s calendar. When you press F9, the WBS duration is back-calculated based on it’s start and finish dates on the calendar you have chosen.

***** NOTE ******

The duration of a level-of-effort activity is based on the Early dates of the hammocked activities, a WBS summary is based on Planned dates BE CAREFULL!!
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Mon, 2008-03-31 16:11
#2
Dieter Wambach
User offline. Last seen 7 years 31 weeks ago. Offline
Joined: 15 Jan 2007
Posts: 1350
Groups: Petro-Chem / Oil & Gas, TILOS
Salut Alexandre
For the summary bars always the default calendar is used.
There are already some threads on this item. Have a look at
http://www.planningplanet.com/forum/forum_post.asp?fid=1&Cat=8&Top=43946
Regards
Dieter
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