Abstract: In most circumstances,the stock-out cost of spare parts can’t be confirmed exactly because of the spe-cial characters of continuous production.Service level constrained(s,c,S)inventory model with continuous re-view policy for coordinated replenishment is established.Comparing with(s,S)policy,its advantage is tested through practical case.At the same time,sensitivity analysis for the factors to the cost saving of coordinated re-plenishment is accomplished and corresponding methods for inventory optimality are put forward for this sort of spare part.

Key words: rarely used spare parts, service level, coordinated replenishment, sensitivity analysis