If a project is not expected to be long-lasting, or if the identity of those taking part is fluid, some form of informal collaboration or coalition may be more appropriate, to avoid unnecessary costs of setting up a more complex structure. These structures involve separate organisations working together to achieve a shared goal. A project may have a working title or brand, but each contributor remains distinct, and may only be contractually responsible for the obligations it promises to fulfil.
If the project is funded, it is likely that a lead organisation will be required to be accountable, accept the funding and deal with the other relationships.
Some new organisations may wish to affiliate themselves with existing organisations, and if this happens, the new organisation will have its own independent identity, but will also be subject to the membership requirements of the group, federation or affiliate scheme.