In this paper, a multiple-server interval queue is considered in which the arrival rate and service rate are interval numbers. A new method namely, level method is proposed to determine the performance measures in the multiple-server interval queue as interval numbers without parametric programming technique. The solution procedure for the proposed method is demonstrated with the help of numerical example. The performance measures of the multiple-server interval queue provided by the proposed method are interval numbers which are very much useful for decision makers for taking the managerial decision-making. © 2016, International Journal of Pharmacy and Technology. All rights reserved.