In this article, a service facility inventory system with server interruptions and a nite number
of sources are considered. The inventory is replenished according to (s; S) ordering policy.
Using the matrix methods, the stationary distribution of the stock level, server status and
waiting area level is obtained in the steady state case. The Laplace-Stieltjes transform of
the waiting time of the tagged customer is derived. Many impartment system performance
measures are derived and the total expected cost rate is computed under a suitable cost
structure. The results are illustrated numerically.