SYSTEM STRUCTURE AND THE EXISTENCE OF A SYSTEM LIFE

reportActive / Technical Report | Accession Number: AD0425767 | Open PDF

Abstract:

The reliability at time t of a system in sustained operation is often taken to be the probability that it functions continuously during the time interval O,t. The standard computation of system reliability finds the probability that the system functions at time t in terms of the probabilities that its components function at time t. This procedure is relevant only if the system, and its components, have lives roughly speaking, a device has a life it functions continuously until some time of failure, and remains failed thereafter. It is shown that if each component of a coherent system has a life, then the system has a life again roughly, a system is coherent if its performance is not impaired by an improvement in the performance of its components. The principal result is that, under reasonable conditions, the converse is true if the system has a life, then the system is coherent and each component has a life. This means that if the standard computation of system reliability is to be used, the system in question should be coherent.

Author(s):
Esary, J. D. ; Marshall, A. W.
Author Organization(s):
BOEING SCIENTIFIC RESEARCH LABS SEATTLE WA
Supplementary Note:
Also available from the author. DOI: 10.21236/AD0425767
Pagination:
0014

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MN-327, D1-82-0309
Monitor Series:
XD
 Subject Terms
Joint Capability Areas:
JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_5.3_Planning; JCA_5_Command and Control
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
*STRUCTURES, LIFE EXPECTANCY(SERVICE LIFE), PROBABILITY
Field(s)/Group(s):
Structural Engineering and Building Technology
Keyword(s):
SYSTEMS
Report Date:
1963 Oct 01