Sharing resources between business units

Hello

We have several business units (BU) and want to share resources.

Typically : 10 BU, each team managing 30 projects.
Each BU has its own parent projects. So the BU manager can recalculate the planning for the whole BU.

But : we want to share resources between BU.
Let's say resource A is planned on a (big) project P1 for BU1, but we want to reschedule it later to priorize a (small) project P2 of BU2.
-> if manager of BU2 calculates the planning, project P1 is not impacted so project P2 is planned after
-> if manager of BU1 calculates the planning, project P2 is not impacted so project P2 is still planned after
-> we do not want to calculate the planning for the whole company : it is both not possible (too many projects) and dangerous (would mean impacting on all projects of all BUs)

Is there an elegant way to handle this with Projeqtor ?

Thanks

Since we do this kind of operation very often, it will be a lot of confusing manual operations (and my colleagues will hate me for that )

In particular : we have "support" teams. A support resource is planning on support activities for the whole year. (we won't use projeqtor tickets at least for some while). But he can eventually be affected to some projects for other BUs. And that happens a lot on the whole support teams.

I see one way to do it "the simple way" (but not elegant) : enter the activity in real work. It will be a good solution for "emergency operations", when we need to exceptionnally plan 2 or 3 days the next week for helping on a project.

Another solution would be to have an option "enforce planning" in planification mode.
- we select start date and planned work (mandatory)
- projeqtor adds 1.0 planned work for all consecutive days after the start date, even if there is already something in the planning for this resource (except real work) : planned work may exceed 1 ! or whatever the FTE is. Note : this is also what happens currently when a resource sets in real work something different that what was planned for that day.
- then other BU managers must recalculate their projects so that extra planned work will be planned elsewhere.
I know you (babynus) don't like the idea, but it is clearly something that is missing for our use cases.
Would it be possible to add such a feature as a plugin ?

I guess it is ticket #1815 :
track.projeqtor.org/view/main.php?direct...Simple&objectId=1815
Will be definitively interesting, and potentially would solve our issue

It is targetted for 5.4.0, can't wait for this version