Title: An insight to availability for O&M support of mechanical systems

Authors: Mohammad Asjad; Makarand S. Kulkarni; O.P. Gandhi

Addresses: Department of Mechanical Engineering, Jamia Millia Islamia, New Delhi, 110025, New Delhi, India ' Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas-110016, New Delhi, India ' ITMMEC, Indian Institute of Technology Delhi, Hauz Khas-110016, New Delhi, India

Abstract: Availability has been widely used in industries, as a tool for measuring system performance. Reliability (R) and maintainability (M) are mainly applicable at the design stage of the system, while the supportability (S) is at the later stage, i.e., during the operating state. Unavoidable delay may directly affect the support task, which may be due to lack of spare parts, crews and improper maintenance, etc. In this work, a mathematical model to estimate the systems availability under O"M support is presented. An effect of reliability, maintainability and supportability in context to availability is also studied. The availability performance is defined to be dependent on reliability (low failure rate), maintainability (easy to repair quickly if necessary) and supportability (logistic resources in the form of spares, equipment and personnel at the right time). The first two describe system qualities; the third is the essence of the support system. The research will be helpful in understanding the effect or R, M and S parameter on the availability of mechanical systems.

Keywords: supportability; system availability; mean time to support; MTTS; O&M support; operations and maintenance; mechanical systems; performance measurement; mathematical modelling; reliability; maintainability; overall equipment effectiveness; OEE.

DOI: 10.1504/IJPQM.2015.072418

International Journal of Productivity and Quality Management, 2015 Vol.16 No.4, pp.462 - 472

Received: 15 Feb 2014
Accepted: 03 May 2014

Published online: 13 Oct 2015 *

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