Weiss and Rosenthal(1992) derive the optimal ordering quan-
tity for a similar EOQ-based system in which a disruption to either
supply or demand is possible at a single point in the future.This
point is known but the disruption duration is random. Parlar and
Perry (1995) extend the EOQD by relaxing the ZIO assumption,by
making the time between order attempts a decision variable
(assuming a non-zero cost to ascertain the state of the supplier),
and by considering both random and deterministic yields.(The ZIO
assumption was also considered by Bielecki and Kumar(1988),
who found that,under certain modeling assumptions,a ZIO policy
may be optimal even in the face of supply disruptions,countering
the common view that if any uncertainty exists,it is optimal to
hold some safety stock to buffer against it.) Parlar and Perry(1996)
consider the EOQD with one,two,or multiple suppliers and non-
zero reorder points.They show that if the number of suppliers is
large,the problem reduces to the classical EOQ.The suppliers are
non-identical with respect to reliability but identical with respect
to price,so as long as at least one supplier is active,the retailer
does not care which one it orders from. Gürler and Parlar(1997)
generalize the two-supplier model by allowing more general
failure and repair processes.They present asymptotic results for
large order quantities. Skouri etal.(2014) discuss an EOQ model in
which entire batches must be discarded due to defects,and they
draw analogies between their model and the EOQD.
Weiss and Rosenthal(1992) derive the optimal ordering quan-
tity for a similar EOQ-based system in which a disruption to either
supply or demand is possible at a single point in the future.This
point is known but the disruption duration is random. Parlar and
Perry (1995) extend the EOQD by relaxing the ZIO assumption,by
making the time between order attempts a decision variable
(assuming a non-zero cost to ascertain the state of the supplier),
and by considering both random and deterministic yields.(The ZIO
assumption was also considered by Bielecki and Kumar(1988),
who found that,under certain modeling assumptions,a ZIO policy
may be optimal even in the face of supply disruptions,countering
the common view that if any uncertainty exists,it is optimal to
hold some safety stock to buffer against it.) Parlar and Perry(1996)
consider the EOQD with one,two,or multiple suppliers and non-
zero reorder points.They show that if the number of suppliers is
large,the problem reduces to the classical EOQ.The suppliers are
non-identical with respect to reliability but identical with respect
to price,so as long as at least one supplier is active,the retailer
does not care which one it orders from. Gürler and Parlar(1997)
generalize the two-supplier model by allowing more general
failure and repair processes.They present asymptotic results for
large order quantities. Skouri etal.(2014) discuss an EOQ model in
which entire batches must be discarded due to defects,and they
draw analogies between their model and the EOQD.
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