Analysis of multistation production systems with limited buffer capacity part 1: The subsystem model (original) (raw)
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2011
In this paper we analyze continuous- ow production lines consisting of a number of machines or servers in series and a finite buffer between each pair of machines. Each machine suffers from breakdowns, for instance because of failures, cleaning, changeover, etcetera. The resulting up- and downtime periods are generally distributed. Because of breakdowns and non-identical machine speeds, the machines are in uenced by each other, resulting in starvation, blocking, and speed adaption. We are interested in throughput and mean buffer content of this production line. The newly developed method relies on decomposition of the production line into two-stage, one-buffer subsystems. The parameters for each subsystem are determined iteratively. A crucial feature of the model is that we deal with generally distributed up- and downtimes. The use of aggregation techniques on the subsystem level is important to be able to analyze larger production lines of up to 16 machines. The proposed method per...
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Classical Regeneration Based Approaches for Output Analysis of Multiserver Systems Simulation
2018
We present and discuss three types of regeneration that are based on classical regeneration for steady-state simulation and output analysis of multiserver systems. First method is artificial regeneration based on exponential splitting property of some distributions. Regenerative envelopes allow to construct upper and lower bound for QoS characteristic of the system. Resampling of New Better than Used interarrivals or New Worse than Used service times accelerates simulation. All this techniques are reduced to classical regeneration and allow to receive shorter regeneration cycles.
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