A fleet account for foundry would let fleet members work on building the same missions,

A five man team account would be team leader controled giveing Job Rolls to each member,
Done in stages with each role only alowing acsess to this or that part of the foundry at a time.

Jod Rolls would be set out some thing like this.
Editor: the team leader/porject manager who aranges the job roles so a Writer is not working on text that a Set desiner might interact with.
Writer: writes the text for this or that map, one Writer per map at that time, So two Writers can work on two maps at the same time.
Set Desiner: sets up the map decor.
Tester: a one man bug tester to test this or that map.
Crash Test Team: the five man team test a map or the full mission.