I have an application used in facilities around the country (USA).

Basically there is a server in each facility. All the data for the app resides on that server. Workstations run the executable locally accessing data on the server. Albeit rare, some workstations are accessing the server via a WAN. Most are on a LAN.

My question: Looking at the big picture and trying to make decisions about the future of my app, I feel I should look into one central database on a server and users accessing the data via the net. How would I make thse decisions? Whom or what literature would I consult to put together a set of questions that would help me determine this?

Thanks,
John