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Constraints...

3 replies [Last post]
Tue, 2007-08-07 22:01
Andrew Musulin
User offline. Last seen 16 years 46 weeks ago. Offline
Joined: 16 Jul 2007
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I currently have a running schedule with no constraints added in for the project complete milestone...I have since progressed the schedule and the expected completion date has pushed out by 2 months or so. I wish to see the amount of negative float I have, so I added a constraint to the original contract completion date to see the negative float but it does not anchor and it continues to get pushed out to the new revised completion date.

What am I missing?
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Replies

Wed, 2007-08-08 05:08
#1
Dieter Wambach
User offline. Last seen 7 years 12 weeks ago. Offline
Joined: 15 Jan 2007
Posts: 1350
Groups: Petro-Chem / Oil & Gas, TILOS
Hi Andrew

I know just two reasons for an activity with a mandatory finish to be shifted:
- The data date is later than the constraint.
- The assigned calendar doesn’t allow working time on this date.
Retained logic or progress override has no influence in this case.

Regards
Dieter
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Wed, 2007-08-08 02:31
#2
Andrew Musulin
User offline. Last seen 16 years 46 weeks ago. Offline
Joined: 16 Jul 2007
Posts: 7
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I was aware of the function of Mandatory Finish and Finish On constraints, but for some reason the program continues to push out to the new Finish date for Mandatory Finish and doesnt show any negative float what so ever if I put a ’Finish On’ constraint on.

Could it have something to do with what is linked to the Milestone??

I have changed the ’Scheduling’ option from Retain Logic to Progress Overide, but that doesnt seem to change anything either!

Really confused!
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Wed, 2007-08-08 01:46
#3
Dieter Wambach
User offline. Last seen 7 years 12 weeks ago. Offline
Joined: 15 Jan 2007
Posts: 1350
Groups: Petro-Chem / Oil & Gas, TILOS
Hi Andrew

There is a difference between "Finish" and "Mandatory Finish". Mandatory Finish will remain at the date you set with float=0 independent from the project’s development. "Finish" will move as you explained but show a negative float. Analogue for "start".
Have a look into the protocol of scheduling: Close to the end you can see the broken relationships and constraints.

Regards
Dieter
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