%0 Journal Article %A Pogorui, A. A. %D 2000 %F zu2:13315 %J Mathematics Subject Classification %P 1-8 %T Estimation of Stationary Productivity of One-Phase System with a Storage %U http://eprints.zu.edu.ua/13315/ %X In this paper we study a system consisting of an unreliable aggregate, a customer and an accumulator located between the aggregate and the customer. Operation of the system is modeled by random evolution in a semi-Markov medium. The stationary average productivity of the system is investigated as a function of the system parameters.