Ted Mittelstaedt wrote: >> [EMAIL PROTECTED] skrev man, 03 dec 2007: >>> Ted Mittelstaedt wrote: >>>> (assuming a standard bell curve applies to device failures, which >>>> it generally does) >>> Actually, hardware failures generally follow a "bathtub curve", almost >>> an inverse bell curve. There is a certain amount of infant mortality >>> where substandard parts will fail immediately or shortly after >>> installation, bad connections and other mechanical and assembly issues >>> are discovered or fail in transit, etc. Then relatively few failures >>> for a long time, and then a gradual ramping up of failures as things >>> wear out, capacitors dry up, etc. >> I think you both agree with each other. The "Bell curve" would >> describe the age of the devices > > (age of device when it fails)
Actually, my point was that it is not a bell curve plotting the age of the device when it fails. The "bathtub curve" commonly used do describe equipment failures with time on the Y axis and number of failures on the X axis starts out relatively high with infant mortality, then drops to a low value rapidly, and then climbs after a length of time as components wear out. http://en.wikipedia.org/wiki/Bathtub_curve -- Jay Hennigan - CCIE #7880 - Network Engineering - [EMAIL PROTECTED] Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
