NDLI: On the Availability of 1-out-of-2 Standby Systems

Content Provider	IEEE Xplore Digital Library
Author	Sherwin, D. J.
Copyright Year	1963
Abstract	The accuracy of the approximation (a1 +a2)/(1 + a1a2) for the availability of a 1-out-of-2:G standby system with unit availabilities a1, a2 is examined. The units have exponential failure and repair time distributions. The approximation is exact for equal repair rates. An expression is developed in terms of a1 and a2 only for the case of equal failure rates, but the approximation is remarkably accurate in this case. A computer run of 5000 evaluations, using random values of failure rates from a uniform distribution from 0 to 0.1 and repair rates from 0 to 1 showed a total range of error from 3.5% over-estimation to 5.2% under-estimation of the true value and a rms error of 0.73%. The approximation is therefore quite good enough for rough work in the early stages of system planning. It is useful because it allows studies to be made entirely in terms of availability, leaving detailed trade-offs between reliability and maintainability until later.
Sponsorship	IEEE Reliability Society
Starting Page	442
Ending Page	444
Page Count	3
File Size	423514
File Format	PDF
ISSN	00189529
Volume Number	R-33
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1984-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Steady-state Availability Probability Maintenance Redundancy Matrices Reliability theory Failure analysis Information analysis Computer errors Standby redundancy Markov chain
Content Type	Text
Resource Type	Article
Subject	Safety, Risk, Reliability and Quality Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Comment on: On the Availability of 1-out-of-2 Standby Systems

Reliability of a 2-Unit Standby Redundant System with Repair, Maintenance and Standby Failure

Stochastic Behavior of a Standby Redundant System

Analysis of 2 Models of Standby Redundant Systems

A 2-Unit Repairable Redundant System with Switching Failure

Confidence Limits for Redundant-System Availability

Reliability of a k-out-of-n warm-standby system

Availability Analysis of 3-State Systems

Reliability Analysis of Systems Comprised of Units with Arbitrary Repair-Time Distributions

On the Availability of 1-out-of-2 Standby Systems

Similar Documents

Comment on: On the Availability of 1-out-of-2 Standby Systems

Reliability of a 2-Unit Standby Redundant System with Repair, Maintenance and Standby Failure

Stochastic Behavior of a Standby Redundant System

Analysis of 2 Models of Standby Redundant Systems

A 2-Unit Repairable Redundant System with Switching Failure

Confidence Limits for Redundant-System Availability

Reliability of a k-out-of-n warm-standby system

Availability Analysis of 3-State Systems

Reliability Analysis of Systems Comprised of Units with Arbitrary Repair-Time Distributions

On the Availability of 1-out-of-2 Standby Systems