DocumentCode :
2539380
Title :
Improving availability and cost performance for complex systems with preventive maintenance
Author :
Reineke, David M. ; Murdock, W. Paul, Jr. ; Pohl, Edward A. ; Rehmert, Ian
Author_Institution :
Inst. of Technol., Wright-Patterson AFB, OH, USA
fYear :
1999
fDate :
18 -21 Jan 1999
Firstpage :
383
Lastpage :
388
Abstract :
This paper investigates improving system limiting availability and expected system cost rate for a complex system through age replacement preventive maintenance (PM). This study defines the complex system as a classic bridge reliability structure consisting of five independent subsystems. A competing risk model is used for each subsystem´s unique life distribution. This model includes two independent modes of failure for each subsystem. They assume the expected system failure repair time and PM action time are known or may be estimated. System-level age replacement PM models are developed for both system limiting availability and expected system cost rate. Often, both availability and cost performance are critical system characteristics. A methodology is presented that allows tradeoffs between availability and cost to be evaluated. The paper demonstrates the methodology for a specific example. The maintenance strategy assumes that failed subsystems are maintained according to their failure mode and working components are preventively maintained. This strategy applies whether failure maintenance or PM action is required. This strategy is selected, since, in terms of maintenance service, it lies between the extremes of pure system-level maintenance and independent subsystem-level maintenance. Limitations of the system-level maintenance strategy are identified
Keywords :
failure analysis; large-scale systems; maintenance engineering; reliability; age replacement preventive maintenance; availability improvement; bridge reliability structure; competing risk model; complex systems; cost performance; critical system characteristics; failure modes; failure repair time; life distribution; Availability; Bridges; Cost function; Defense industry; Density functional theory; Distribution functions; Hazards; Manufacturing industries; Performance analysis; Preventive maintenance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Reliability and Maintainability Symposium, 1999. Proceedings. Annual
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-5143-6
Type :
conf
DOI :
10.1109/RAMS.1999.744148
Filename :
744148
Link To Document :
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