This paper develops a two-period order decision model for the dynamic perishable product. The theoretical
analysis of the optimal solutions to the considered problem is presented, and a simple method for finding the optimal twoperiod
order policy is given as well. A practical purchasing example of Netac USB flash driver is presented to illustrate the
application of the model. Finally, according to the investigation of the relationships between the order decision and such
factors as the demand fluctuation, the correlation coefficient of two-period demands, and backlogging rate, some important
managerial insights are obtained.