Day of coordination will be needed when you have already prepared the whole wedding, ordered all the services, and on the wedding day you need a specialist who will control the whole process, coordinate the guests and the wedding team.
After all, the bride will be difficult to be in the role of coordinator and the bride at the same time, and to take the whole process on girlfriends or relatives, this means that they will not be able to have a fun on the wedding. Besides non-professional assistants could not take into account some small details and all the wedding celebration could be not go as planned like wanted.
The coordinator starts his work in the morning of the wedding and finishes it with the departure of the last guest.
If you have any questions text me, feel free