A model is described for projecting inventories of enlisted naval personnel expected to result from management policy aimed at controlling the size and experience mix of the inventory. The effects of policy changes are modeled as changes in flow probabilities into and through an inventory partitioned along dimensions of experience level (length of service) and time until end of obligated service. An example is presented which illustrates several innovative features of the model which lead to an improved planning capability. Continuing efforts to improve the model are discussed.