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Strategies & Market Trends : Roger's 1998 Short Picks
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To: BelowTheCrowd who wrote (10124)6/17/1998 10:18:00 AM
From: Marconi  Read Replies (2) of 18691
 
Hello Michael Gat:
<< It's unlikely they would drop out of control since there are mechanical systems to prevent that, but you could spend the bulk of New Year's day stuck in between floors with the lights out, waiting for a rescue.
As you can imagine, factory floors have similar logistical problems. A single lost day at the factory is a BIG deal. In many industries it means the difference between a profitable quarter and not.>>
Two quick points.
1-The 'stuck' elevator is not smart enough to operate normally and then catch people in between floors. Presumably the response routine for manual button response operates independent of the load scheduling routine. I agree with your point, elevators are built with redundancies for reliability.
2-When I studied digital circuit design many, many moons ago, we were taught to design every circuit to settle out to a known state after power up. Hardware should be resettable in all events. A program could persist at some unwanted instruction step--which is a firmware or software issue. I think it would be hard to assert that the firmware folks are all so thick they have imbedded codes that will persistently fail the operation of a device start of A.D. 2000. Switch off, switch on is often enough to reset systems. I'll go out on a limb--any electronic system without a clock to watch should be free of A.D. 2000 faults. It's only the clock watchers that can have a problem.
Best regards,
m
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