The space shuttle had three computers and needed a two-of-three voting system to determine if a sensed variable was real or phantom. This would be a good thing regarding a leaking door seal on the capsule. Safety sensing isn’t a new technology, but it seems that understanding what a safety system function is might be lacking a bit.

In this episode of Control Intelligence, written by contributing editor Jeremy Pollard, editor in chief Mike Bacidore talks about safety systems.