This permission management strategy improves the corporate security for sensitive data, reduces the number of requests to IT and makes environment more open and collaborative. To support that strategy it is good to have an article on a portal which describes the process and a list of the business owners for each part of the corporate portal. Access to shared corporate pages like a news or branding information can be managed automatically based on organisation units membership.
For example, if we have hired an HR professional and have created an Active Directory account for the person than the account will be included in HR organisation unit which has access to shared upper level sites on the portal. This process not require a lot of efforts and should be done only on creation of the account.