In one project, we had three nearly identical presentations because no one knew the others were already working on them. We fixed this by creating a shared “in progress” folder where everyone posted drafts before starting work. I also read on
iweee.org about using a central library to make ongoing work visible to the whole team. Once we applied this, duplication dropped to zero, and collaboration improved. Now we can easily see who’s working on what, and no one has to redo tasks unnecessarily.