For better analysis of bullwhip effect changes and study of its behavior based on α and L variation, we represent bullwhip effect values by curves in Figs. 2 and 3. Fig. 2 depicts that bullwhip effect for product 1 increases when smoothing constant (α) and leadtime rises. The upper curves are derived for larger lead-time values. In addition, the same condition is valid for the second product in Fig. 3. Bullwhip effect measure is related to αand L leadtime directly.