Technion, IEM faculty - Operations Research seminar
Speaker: Asaf Zviran
Title: Analysis and control of Fork-Join networks in heavy-traffic
Date: 27/12/2010
Time: 12:30
Place: Bloomfield-527
or below

Abstract: This work addresses the problem of analysis and
control of fork-join networks in the conventional Heavy-Traffic
diffusion regime. Standard fork-join networks are feed-forward,
which are relatively easy to control. We thus allow
probabilistic feedback, which turns the problem into a
challenging one. In our models, activities are associated
uniquely with customers. They are hence non-exchangeable in the
sense that one can not join activities associated with different
customers ^ this is the case in healthcare (e.g. emergency
departments) and multi-project environments (and in contrast to
assembly networks). In this framework we introduce a natural
concept of optimality, and then solve for the optimal control,
asymptotically in heavy-traffic. The central ingredient in the
proof is the establishment of asymptotic equivalence between
non-exchangeable and exchangeable dynamics. This is joint work
with Rami Atar and Avishai Mandelbaum.

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