Mean value analysis is an elegant tool for determining mean performance measures in queueing models. We use the technique to analyze the M/G/1 retrial queue with exponential retrial times. We also show how the relations can be adapted to obtain mean performance measures in more advanced M/G/1-type retrial queues. 							
						
							
					 															
					Jesus R. Artalejo, J. A. C. Resing