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|Titolo:||Moments of Cumulated Output and Completion Time of Unreliable General Markovian Machines|
|Autori interni:||COLLEDANI, MARCELLO|
|Data di pubblicazione:||2011|
|Abstract:||Performance evaluation models are used by companies to design, adapt, manage and control their production systems. In the literature, most of the eort has been dedicated to the development of effcient methodologies to estimate the rst moment performance measures of production systems, such as the expected production rate, the buer levels and the mean completion time. However, there is industrial evidence that the variability of the production output may drastically impact on the capability of managing the system operations, causing the observed system performance to be highly dierent from what expected. This paper presents a general theory and a methodology to analyze the cumulated output and the lot completion time variability of unreliable machines and systems characterized by general Markovian models. Both discrete models and continuous reward models are considered. We then discuss two simple examples that show how the theory developed in this paper can be applied to analyse the dependency of the output variability on the system parameters.|
|Appare nelle tipologie:||04.1 Contributo in Atti di convegno|
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