could be, but how many sites have you seen do that? in reality, it just doesn't work that way. a new site is developed and click, a new format is created. no one has to shut their site down to make changes.
In the real world, you would build the new site, leave the old one, and swap them when you decide to cut over. You never build a site 'live'. Good theory though!
I would think it is multiple updates to the site. New pics, update reports, most likely a whole new website design being implemented.