Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

Stevan Djenadic, Dragan Ignjatovic, Milos Tanasijevic, Ugljesa Bugaric, Ivan Jankovic and Tomislav Subaranovic
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Stevan Djenadic: Faculty of Mining and Geology, University of Belgrade, 11000 Belgrade, Serbia
Dragan Ignjatovic: Faculty of Mining and Geology, University of Belgrade, 11000 Belgrade, Serbia
Milos Tanasijevic: Faculty of Mining and Geology, University of Belgrade, 11000 Belgrade, Serbia
Ugljesa Bugaric: Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade, Serbia
Ivan Jankovic: Ministry of Mining and Energy, 11000 Belgrade, Serbia
Tomislav Subaranovic: Faculty of Mining and Geology, University of Belgrade, 11000 Belgrade, Serbia

Energies, 2019, vol. 12, issue 21, 1-18

Abstract: Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the coefficient of time use of the machine. This approach is not good enough because it does not go into the structure of the availability itself and requires a high level of IT support in system monitoring. In this sense, this paper will use the fuzzy theory and the corresponding analytic hierarchy process (AHP) multi-criteria analysis to present a conceptual and mathematical model for the assessment of availability based on expert judgment. The model will be shown in the case study (on the example) of bulldozers working in the open-pit lignite mine.

Keywords: availability; fuzzy theory; AHP multi-criteria analysis; expert judgment; bulldozer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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