Especially if it cannot alert people as fast as Twitter.
You are wasting money on Digital Signage Software that claims to alert and update screens "within minutes". It takes SECONDS for emergency situations to happen and escalate.
Does your Emergency Digital Signage software have the speed of Twitter? Does your Emergency Digital Signage software have the reach of Twitter? Does your Digital Signage software allow you to integrate Twitter? If not, you may want to rethink using your digital signage as part of your Emergency Alert System.