The paper considers a two-level inventory system with one warehouse and N identical retailers. Lead times (transportation times) are constant and the retailers face independent Poisson demand. In a previous paper, a recursive procedure was derived for determining the policy costs for an average item in case of one-for-one replenishment policies. In this paper it is shown how these results can be used for the exact or approximate evaluation of more general policies where both the retailers and the warehouse order in batches. The present methods are compared to the method recently suggested by A. Svoronos and P. Zipkin.
