They are designed to be a stepping stone to a more permanent arrangement for future contact. (relationships-scotland.org.uk)
On the other hand, a more permanent arrangement involving live - in or live - with grandparents can prove beneficial for everyone involved. (bookbrowse.com)
In general, parenting coordination works best for parents who already have some kind of permanent arrangements in place regarding parenting issues. (bcparentingcoordinators.com)