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The University of Southampton
CORMSIS Centre for Operational Research, Management Sciences and Information Systems

CORMSIS Seminar Event

16:00 - 17:00
23 October 2014
Building 2 Room 3041

For more information regarding this event, please email Lyn Thomas at .

Event details

Modeling transshipment in periodic review inventory systems


Transshipments are a means to redistribute inventory in a network of customer-facing locations in order to better meet customer demand.  Models of transshipments generally assume either a reactive (i.e. to meet existing shortages) or proactive (i.e. to meet anticipated future shortages) approach.  This research proposes a model that combines reactive and proactive transshipments.  Approximate dynamic programming is applied to develop a heuristic policy for the problem.  For comparison, a lower bound on the expected cost of meeting demand is constructed.  Experiments with test problems show that, for certain problem types, the gap between actual cost and the lower bound is 1.5-3.5% for the proposed heuristic compared to 7-14% for commonly used policies.  This improvement is due to fewer transshipments of larger size.

Speaker information

Professor Thomas Archibald,University of Edinburgh

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