| Summary: | 碩士 === 國立交通大學 === 管理科學研究所 === 84 === The classical Economic Order Quantity model assumes the
parameters of the model to be constant. But in the real world
situations, many parameters such as the demand rate, the
purchasing price, and other cost elements may vary from time to
time. In this study, we develop two ordering policies to
control the inventory system where one or all of the parameters
will change at some time in the future. When only the change
of purchasing price is expected, our numerical examples show
that Policy 2 is the best ordering policy. When charges
of more than one parameter are expected, Policy 1 becomes the
best choice in several cases. The difference of average
total inventory cost between the two policies is, however,
very insignificant and can be neglected. Therefore, we suggest
that Policy 2 should be implemented in the real world
application and can provide the inventory system with
satisfactory results.
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