Abstract
The paper deals with (s,S) inventory models, where S is maximum inventory level, while s represents safety stock level. Whenever the inventory level falls to s level, an order M = S-s is placed assuming S>2s. The lead time (time between the placement of an order and delivery) has a stochastic character and if the customer's demand is placed at the time when the inventory level is zero, the demand is not satisfied and it goes to an orbit of unsatisfied customers. After a random amount of time these unsatisfied demands are reconsidered and satisfied provided that the inventory level is positive at the time. The paper illustrates application of the model to the selected parametre values s and S which minimize the total expected cost.
Highlights
Abstract:The paper deals with(s,S) inventory models, where S is maximum inventory level, while s represents safety stock level
Whenever the inventory level falls to slevel
if the customer's demand is placed at the time whenthe inventory level is
Summary
Abstract:The paper deals with(s,S) inventory models, where S is maximum inventory level, while s represents safety stock level. Ukupni troškovi zaliha obuhvataju troškove pribavljanja zaliha, troškove držanja zaliha, kao i troškove nedostatka zaliha. Troškovi pribavljanja zaliha obuhvataju troškove ispostavljanja porudžbina (uključujući i troškove pripreme proizvodnje), troškove pripreme, istovara, smeštaja i kontrole zaliha, kao i propuštene količinske rabate i ostale popuste. Promenljivi dodatni troškovi su prouzrokovani dejstvom raznih rizika pri držanju zaliha, kao što su gubitak vrednosti zaliha, izloženost zaliha oštećenju i kvaru, pronevera i sl.
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