I've looked at the docs and can't see something that would do this - when I assign a task to a user, eg:
[Task A] on {Dev A} lasts 3 days
I want to not be able to assign anything else to {Dev A}. Otherwise I have to structure all the work I give to {Dev A} sequentially, ie:
[Task A] on {Dev A} lasts 3 days
[Task B] on {Dev A} lasts 2 days and starts at [Task A]'s end
whether or not [Task A] really blocks [Task B].
