“…Heindl proposed a numerical approach whereby the output process of an MMPP/G/1/(K) queue was approximated by a semi‐Markov model, which was then converted to an MMPP 2 , this approach is computationally expensive. Lim et al gave a general framework for the calculation of the Laplace transform of the interdeparture times for a single server queue with Markov renewal input and general service time distribution (MAP/G/1), which is also on the basis of the computationally expensive matrix‐geometric solution. No closed‐form solution was given.…”
Section: The Departure Process Of Mmpp2/m/1 Queuementioning
“…Heindl proposed a numerical approach whereby the output process of an MMPP/G/1/(K) queue was approximated by a semi‐Markov model, which was then converted to an MMPP 2 , this approach is computationally expensive. Lim et al gave a general framework for the calculation of the Laplace transform of the interdeparture times for a single server queue with Markov renewal input and general service time distribution (MAP/G/1), which is also on the basis of the computationally expensive matrix‐geometric solution. No closed‐form solution was given.…”
Section: The Departure Process Of Mmpp2/m/1 Queuementioning
“…In the past, several papers studied the autocorrelation of the departure process at a single server queue ( [3], [5], [6], [25], [10], [9], [17] and references therein). In this section, we study the impact of the additional waiting times for a release authorization on the autocorrelation of the M/M/1 departure process.…”
Section: Autocorrelation Of Departure Processmentioning
A key characteristic of MRP applications includes the coordination of assembly and purchased component requirements by time-phased order releases. In the literature on order review and release strategies, timephased order releases are described as a worthy alternative to load limited release mechanisms. This paper initializes the development of a stochastic model that quanti…es the consequences of time-phased order releases on the stochastic system behavior. This is done by introducing them in an open queueing network composed of two M/M/1 stations. The core of the analysis is focused on the modi…ed ‡ow variability which is speci…ed by the second-order stationary departure process at the …rst station in the routing. It is a process characterized by a negligible autocorrelation. Based on the stationary-interval method and the asymptotic method, we propose an approximating renewal process for the modi…ed departure process. The modelling e¤orts provide interesting conclusions and practical insights on some coordination issues in stochastic multi-echelon systems. Contrary to the SCV [D n ] expression in section 5, this analytical expression for Dn (1) does not allow a P-value equal to 100%. Figure 18 reproduces Dn (1)
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