Scope management is an important part of the company to inform the public and potential investors the projects description and heading. Its helpful for the company to have this timeline because they can use it to meet deadlines and allow others to expect a certain outcome at any given time.
I would plan the scope management to be agreed upon by all parties to allow for a most realistic timeline. I would also want the document to be accessible by anyone interested and involved personal, with updates and edits made available with every month that passes.