The company that I work for has a vlan setup for each floor and each floor is connected via a switch which is then trunked to the management switch. From my understanding of a vlan, the purpose is to logically connect machines that are not physically connected. In our case, we have vlans on floors that are physically connected already so I would deem the need for vlans unnecessary.
To explain it better here is a brief example: the 2nd floor is vlan2 and consists of finance, IT, etc. The same goes for the 4th floor, it is vlan4 but consists of dispatch, HR, finance, etc.
Why would one setup vlans like this? Wouldn't you set it up so that finance is on vlan2, and IT on vlan4, etc.?