Vigilance Control
The main safety failing with the basic dead man’s system is the possibility of the operating device being held permanently in position, either deliberately or accidentally. Vigilance control was developed to detect this condition by requiring that the dead man’s device be released momentarily and re-applied at timed intervals.
There has also been a proposal to introduce a similar system to automotive cruise controls.
A hybrid between a dead man's switch and a vigilance control device is a dead-man's vigilance device.
Read more about this topic: Dead Man's Switch
Famous quotes containing the words vigilance and/or control:
“What I am now warning the People of is, That the News-Papers of this Island are as pernicious to weak Heads in England as ever Books of Chivalry to Spain; and therefore shall do all that in me lies, with the utmost Care and Vigilance imaginable, to prevent these growing Evils.”
—Richard Steele (1672–1729)
“The child knows only that he engages in play because it is enjoyable. He isn’t aware of his need to play—a need which has its source in the pressure of unsolved problems. Nor does he know that his pleasure in playing comes from a deep sense of well-being that is the direct result of feeling in control of things, in contrast to the rest of his life, which is managed by his parents or other adults.”
—Bruno Bettelheim (20th century)