bad design
Feb. 22nd, 2006 05:00 pmI discovered today that our office has a race condition.
The doors from our space to the hall are connected to an alarm system. To enter through one of those doors you have to swipe a card and enter a code; to leave through one of those doors you have to push a button, which (we were told) disables the alarm for 60 seconds. 60 seconds ought to be long enough for anyone to walk the 10 feet to the door and get out, so I've been puzzled by the frequency with which the alarm goes off. We're all smart people -- are we really that bad about remembering to hit the button?
This afternoon I hit the button, saw the indicator light that said I'd connected, opened the door -- and set off the alarm. That's when I learned that closing a door resets the alarm; it's not really a 60-second window. So if I hit the button while the other door is open, and that door is closed before I walk over and open my door, the alarm goes off.
Bugger. While I don't sit right next to the alarm like some of my unfortunate coworkers, I sit close enough to hear it when it goes off. (That sucker is loud.) And I'm told there's nothing we can do about this problem. This seems like poor design; while it would come up only rarely in, say, your house with a handful of occupants, with close to 100 people and the restrooms and smoking area on the other side of those doors, there's a lot of traffic.
(Of course, we could address the problem informally, rather than with the alarm company -- but we have to be motivated. A door-cam would do it, but I don't care that much.)
The doors from our space to the hall are connected to an alarm system. To enter through one of those doors you have to swipe a card and enter a code; to leave through one of those doors you have to push a button, which (we were told) disables the alarm for 60 seconds. 60 seconds ought to be long enough for anyone to walk the 10 feet to the door and get out, so I've been puzzled by the frequency with which the alarm goes off. We're all smart people -- are we really that bad about remembering to hit the button?
This afternoon I hit the button, saw the indicator light that said I'd connected, opened the door -- and set off the alarm. That's when I learned that closing a door resets the alarm; it's not really a 60-second window. So if I hit the button while the other door is open, and that door is closed before I walk over and open my door, the alarm goes off.
Bugger. While I don't sit right next to the alarm like some of my unfortunate coworkers, I sit close enough to hear it when it goes off. (That sucker is loud.) And I'm told there's nothing we can do about this problem. This seems like poor design; while it would come up only rarely in, say, your house with a handful of occupants, with close to 100 people and the restrooms and smoking area on the other side of those doors, there's a lot of traffic.
(Of course, we could address the problem informally, rather than with the alarm company -- but we have to be motivated. A door-cam would do it, but I don't care that much.)
(no subject)
Date: 2006-02-23 03:15 am (UTC)So, dike-cutters, and don't tell anyone it was you. :-)
(no subject)
Date: 2006-02-23 11:15 am (UTC)(no subject)
Date: 2006-02-23 11:41 am (UTC)(no subject)
Date: 2006-02-23 02:05 pm (UTC)(no subject)
Date: 2006-02-23 01:38 pm (UTC)