You can schedule force shutdowns, logoffs and restarts by creating a rule via the prohibit functionality. When you create a rule, and apply it to a subset of computers, these computers will auto shutdown/logoff/restart at the time you specify.
You can also force remote shutdowns, logoffs and restarts on the fly, of as many computers as you want.
Let's say you administer a study center with, say, three hundred computers, and it's closing time. You open the Logon Analyzer web interface, select the computers in your Active Directory, and press 'Ok'.