Advances and Applications in Statistics
Volume 53, Issue 5, Pages 569 - 597
(November 2018) http://dx.doi.org/10.17654/AS053050569 |
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RELIABILITY ANALYSIS OF RODDING ANODE PLANT IN AN ALUMINUM INDUSTRY WITH MULTIPLE REPAIRMEN
Yaqoob Al Rahbi, S. M. Rizwan, B. M. Alkali, Andrew Cowell and G. Taneja
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Abstract: The paper presents reliability analysis of the system consisting of a single unit at each of the eight stations of a rodding anode plant in an aluminum industry. Concept of multiple repairmen is used in this analysis in order to restore the system operation upon failure in any of the units. The entire manufacturing process of aluminum blocks goes through eight stations viz., butt shot blast station 1, butt and thimble removal press station 2 with standby arrangement, butt and thimble press station 3, stub straighten station 4, stub shot blast station 5, stub coating and drying station 6, casting station 7 and anode rod inspection station 8. Six years of maintenance data on component failures, repairs and associated costs are collected for the purpose, and various rates are estimated from the data. Failure of the system at any station brings the entire system to a complete halt, except the butt and thimble removal press station because of the parallel standby arrangement, and does not affect the system operation completely unless both fail. Measures of system effectiveness such as mean time to plant failure (MTPF), availability of the plant, busy period of repairman and expected number of repairs have been obtained. Semi-Markov processes and regenerative point techniques are used in the analysis. |
Keywords and phrases: reliability, semi-Markov process, regenerative point technique, failure, repair.
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