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South African Journal of Industrial Engineering

On-line version ISSN 2224-7890
Print version ISSN 1012-277X

S. Afr. J. Ind. Eng. vol.20 n.1 Pretoria  2009


A complex three-unit parallel system with preparation time for repair



Y.A. MwangaI; J.W. JoubertII, III; V.S.S YadavalliIV

IInstitute of Statistics and Applied Economics, Makerere University, Uganda
IIDepartment of Industrial & Systems Engineering, University of Pretoria, South Africa
IIIBuilt Environment, Council for Scientific and Industrial Research (CSIR), South Africa
IVDepartment of Industrial & Systems Engineering, University of Pretoria, South Africa




It is reasonable to expect that preparation time is needed to ready a repair facility before a repair can be carried out. A three-unit system with a "preparation time' for the repair facility is studied in this paper. The steady-state availability of such a system is obtained. The asymptotic confidence limits of the steady state availability are obtained numerically.


Redelikerwys kan verwag word dat 'n herstelproses voorafgegaan word deur 'n voorbereidingsproses voordat herstel 'n aanvang kan neem. 'n Sisteem wat bestaan uit drie eenhede waar 'n sodanige voorbereidingsproses voor herstelwerk moet plaasvind word ondersoek. Die gestadigde stelselbeskikbaarheid met asimptotiese vertrouegrense word numeries blootgestel.



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