NDLI: An equivalent age model for condition-based maintenance

Content Provider	IEEE Xplore Digital Library
Author	Henry, A.J. Nachlas, J.A.
Copyright Year	2012
Description	Author affiliation: Department of Industrial & Systems Engineering, 250 Durham Hall, Blacksburg, VA 24061 (Henry, A.J.; Nachlas, J.A.)
Abstract	Over the recent past, the evolution in maintenance planning techniques has been encouraging. The transition from time and calendar based strategies under “good as new” assumptions to equipment status monitoring and non-stationary post maintenance time to failure models has been difficult but steady. In this paper, we extend the recently defined equivalent age model to condition-based maintenance (CBM) under non-stationary post-maintenance states. The use of an equivalent age model was recently proposed in the literature to account for the effect of the variations in intensity of use, ambient operating conditions and device technology (based on its vintage) on a device/system's aging rate. In certain applications, it is reasonable to foresee the existence of an interaction effect between usage profiles and operating conditions on a system's aging rate. This interaction effect was neglected in previous works where the effects of individual measures of usage intensity and operating conditions were assumed to be independent. In addition, there have been no attempts in the literature to investigate how equivalent age can be combined with a predictive maintenance model. In this paper, we relax the independence assumption seen in previous equivalent age literature and include the ability to model maintenance history. Moreover, we show practitioners how to develop a more complete maintenance strategy that allows for both corrective maintenance (CM) and CBM using a simple decision routine. We provide an analytical example that illustrates the model's sensitivity to the operating and ambient conditions. This leads to the construction of a more effective maintenance plan, which takes into account the probability of a future catastrophic equipment failure based on historical usage profiles, ambient conditions and vintage. Additionally, maintenance can be triggered by abnormal shifts in process conditions (which we assume to be associated with abnormal degradation or equipment wear).
Starting Page	1
Ending Page	6
File Size	463215
Page Count	6
File Format	PDF
ISBN	9781457718496
ISSN	0149144X
e-ISBN	9781457718519
DOI	10.1109/RAMS.2012.6175484
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Maintenance engineering Mathematical model Time measurement Aging Degradation Equations Reliability vintage ambient conditions equivalent age intensity of use mathematical modeling predictive maintenance
Content Type	Text
Resource Type	Article

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

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