Abstract. The article proposes a simple algorithm to define parameters of block maintenance policy of multi-unit systems composed of elements with economic dependency. The procedure may be used especially in the case when elements of a system are not identical in the sense of their probability characteristics and analytical solution is inaccessible.Keywords: block replacement policy, maintenance decision, economic dependency, availability Streszczenie: Opracowanie zawiera algorytm, który pozwala wyznaczyć parametry polityki wymian grupowych w systemie z zależnością ekonomiczną. Procedura ma zastosowanie w systemach o niejednorodnych elementach. Kryterium optymalizacji jest minimalizacja kosztów i maksymalizacja gotowości systemu.Słowa kluczowe: strategia wymian blokowych, decyzje obsługowe, zależność ekonomiczna, gotowość
There are many models and methods that enable estimation system availability when set size of spares inventory is accessible. Correct determining of standby of a system should consider also the lack of inventory delivery precision effect. The paper presents model of inventory critical level of spare element impact on technical system availability when delivery moment is assumed to be a random. Presented approach allows to calculate the probability of the system down time and probability of its availability-based consequences.
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