Fixed unit task - duration doesn't recalculate

[Babar]

I have a fixed unit task with effort driven checked in a project. When
I assign more than 1 resource to it, the duration doesn't recalculate.
Even if I try the same thing on a new project on my computer, the
duration doesn't change .. weird.

I think it might be do with some setting but I'm not completely sure.
Any help would be greatly appreciated.


Babar

 

[Jan De Messemaeker]

Hi,

It doesn't change when you FIRST assign ALL RESOURCES simultaneously.
It does when you assign them one after the other.
HTH

 

[Catfish Hunter]

Do you have your Calculation set to auto?
Effort Driven is for task with more than 1 resource. MS Proj "splits" the
task according to work per resource.
I never put more than one resource per task when building a detailed
schedule.

 

[Babar]

Thanks Jan. I already tried that but it didn't work. Somehow the
duration value never changes.

Any other suggestions?
Babar

 

[Babar]

It was the Microsoft Business Solution - Solomon blocking it somehow.
Now when I remove the integration, duration changes just like normal ..
weird.

Thanks for your help.
Babar

 

[bgane]

Is there a way to have Project not 'split' the task according to work per
resource? I want Duration calculated based on the combined resources, not
the task split, and each resource working independently.

 

[Steve House [Project MVP]]

Duration is always the time from when a task begins until it's done. With
multiple resources, it's from whenever the earliest starting resoiurce
starts until the latest finishing resource finishes, regardless of whether
they work together or independently. If I have a task that has 2 days of
work split between Joe and Bill, Joe does his work on 01 April and Bill does
his on 01 May, the duration of the task will be 4 weeks. If they both work
together, the duration will be 1 day. If Joe does his on Mon and Bill does
his on Tue, the duration will be 2 days. Same 2 man-days of work, same 100%
resource assignment for both in all three cases.

Your initial post could be explained in a couple of ways depending on how
you're assigning resources. First of all, the difference between effort
driven and non-effort driven only kicks in when you add or remove resources
AFTER the INITIAL resource assignment. Whether I put on one guy or 20,
whther they're assigned 100% or 10%, duration never changes with the initial
resource assignment. It is as if Project was saying to itself "When he
estimated that the task would take XX days, he knew that this was the
resource assignment he was going to use and that formed the basis of his
estimate" and it doesn't mess around with it. It's only when you change you
mind and alter the resource assignment later that it looks at the effort
driven setting to decide how to handle the change. So the first question to
ask you is, are you assigning the resources one after the other or are you
assigning them all at once?