Encoding Device Behavior
cmdIn
=on &
Failure
=None
Hung
cmdOut =NULL
Off
cmdOut = Null
On
cmdIn=open -> cmdOut=open
cmdIn=close -> cmdOut=close
cmdIn
=off &
Failure
=None
Failure
=Hang
Failure
=Hang
VDU
Turn on
Electronics
0
1
Time t
Time t+1
off
none
on
null
on
open
open
VDU
VDU Failure
cmdIn
cmdOut
Explain what the constraints are, generally spend
more time on this slide.