Kim, Sunggon; Kim, Jongwoo; Lee, Eui - In: Mathematical Methods of Operations Research 64 (2006) 3, pp. 467-480
We consider a G / M / 1 queue with two-stage service policy. The server starts to serve with rate of μ<Subscript>1</Subscript> customers per unit time until the number of customers in the system reaches λ. At this moment, the service rate is changed to that of μ<Subscript>2</Subscript> customers per unit time and this rate continues...</subscript></subscript>