Title :
Effect of DOA spares on predicted system reliability [switching system]
Author :
Hawley, Frederick C. ; Murphy, Patricia L.
Author_Institution :
Bell Commun. Res., Red Bank, NJ, USA
fDate :
10/1/1988 12:00:00 AM
Abstract :
The authors examine the effect of the initially defective probability, or as it is also known, the dead-on-arrival (DOA) probability, of spare circuit packs on the predicted reliability of a duplex system. A reliability model to incorporate the DOA probability and the associated spare-pack replacement time is developed. Calculations are made in an attempt to quantify the effect of these two variables on the predicted downtime of a representative duplex system. For the system used in this study, it is shown that if the DOA probability is 5% or more, the predicted downtime estimate is 70% greater than the estimate obtained using the standard assumption of a DOA probability of zero
Keywords :
electronic switching systems; probability; reliability; DOA spares; dead-on-arrival; downtime; duplex system; initially defective probability; predicted system reliability; spare-pack replacement time; switching system; Central office; Direction of arrival estimation; Manufacturing; Predictive models; Reliability; Springs; Switching circuits; Switching systems; System performance;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
