810635.fig.004a
(a) Perturbation of first inventory level
810635.fig.004b
(b) Perturbation of second inventory level
810635.fig.004c
(c) Estimator of the first demand coefficient
810635.fig.004d
(d) Estimator of the second demand coefficient
Figure 4: (a) and (b) are the perturbation of the first and second inventory levels about their inventory goal levels as the demand rate is a linear function of the inventory level. (c) and (d) are the difference between dynamic estimators of the first and second demand rates and their real values.