A new estimator for stationary distribution of the inventory model of type (s, S)

We consider  inventory model of type insert ignore into journalissuearticles values( s , S ); which is used mostly in stock control policy. It is very important to know characteristics of an inventory model of type insert ignore into journalissuearticles values( s, S );, such as stationary distribution. Using the straight line approach of Frees insert ignore into journalissuearticles values(1986a);, we establish estimator for ergodic distribution of  inventory model of type insert ignore into journalissuearticles values( s , S ); and investigate asymptotic properties of this estimator such as consistency, asymptotic unbiasedness and asymptotic normality.