That must have been involved in several other departments should be understanding and dialogue to find solutions so that you don't have to duplicate work that causes waste of time.
Task that requires several related departments. Should have an understanding discussed. And a conclusion so as not to be redundant and a waste of time worked.
Work must be related to many departments. Should have the understanding to talk to each other. And find the conclusion to be redundant work, which are a waste of time.