The use of priorities allows us to improve the quality of service of inhomogeneous customers in telecommunication networks. inventory and health-care systems. An important modern direction of research is to analyze systems in which priority of a customer can be changed during his/her stay in the system. We considered a single-server queuing system with a finite buffer. https://www.chiggate.com/shades-eq-gloss-07m-driftwood-for-sale/