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ProjeQtOr free project management software - Issue when running the planning with "fixed duration" and dependencies - ProjeQtOr
 
 

Issue when running the planning with "fixed duration" and dependencies

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17 Nov 2021 17:14 - 17 Nov 2021 17:15 #1 by BaptisteAW
Hello,

I'm planning activities with "fixed duration", I add a dependency "end-start" so it postpone the start of the next activity to the end.
And when I run the planning it put the activity on the past without reason. The activity is assigned, only parameters/constraints are the fixed duration of 10 days and dependency end-start. See screenshots attached.

Thank you for your help.
 
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Last edit: 17 Nov 2021 17:15 by BaptisteAW.

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22 Nov 2021 20:37 #2 by babynus
I cannot reproduce.
Are you sure that both tasks are "Fix duration" ?

Please try and reproduce on Demo.

Babynus
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24 Nov 2021 13:08 - 24 Nov 2021 13:09 #3 by BaptisteAW
I cannot reproduce too.
But on this project I cannot explain why it is doing this.
Have you a way to have a look on our ProjeQtOr instance ?
The Project is the following, and the two activities are at the bottom of the screenshot.

 

Thank you
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Last edit: 24 Nov 2021 13:09 by BaptisteAW.

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25 Nov 2021 09:43 - 25 Nov 2021 09:43 #4 by babynus
It seems the parent activity 3.7.8 has a dependency with upper activity 3.7.7.
As it it drawn, I guess it is a end-end dependency.
Can you try and remove it ?

Babynus
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Last edit: 25 Nov 2021 09:43 by babynus.

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25 Nov 2021 09:50 #5 by BaptisteAW
Thank you that solved the issue.

But I don't understand why it works like this ?
Because for me this dependency is a constraint which prevent 3.7.8 to finish before 3.7.7. So I dont understand why it has an impact on this.

Thank you

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25 Nov 2021 11:23 #6 by babynus
Hi,

It is a restriction of ProjeQtOr, which does not really manage "backward" planning.
When you set an end-end dependency from predecessor X to a parent activity P, all the activities (A and B) on the parent get the dependency, and this will "remove" internal end-start dependencies.
What you may do is define end-end dependency from prececesor to last activity under the parent activity (from X to B).
But I gess you won't really get what you expect as predecessor of last actity (A) will be planned ASAP, and not The Latest possible to fit the end-start dependency. 
This is because of unavalability of "reverse planning mode" (what you expect is some reverse planning inside the parent activity)

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