I am re-organizing my division SharePoint site. Currently it has extremely light use. There is 1 site collection and the 7 department/regions share this Site Collection. There are no sub sites. Since they are 7 distinct teams with minor overlap am I better off creating 7 sub-sites or 7 Site Collections...Lets just call the 7 teams US East, US Midwest, US West, US South, CANADA, Ireland, and England.
The tasks performed for each region is basically the same for each group, but focuses on the vendors for that particular region. The only overlap is some training documents, announcement, etc.
Any suggestions to provide a a current SharePoint site that allows the 7 regions today to operate independently of each other (subsites or site collections ?) yet also be flexible. As an example if someone in Finance from Ireland wanted to look at all Product A Invoices for the month of May for all Finance regions that have aggregated information on Product A.