Ömer Özümerzifon, M.Sc.

Ömer Özümerzifon, M.Sc.

Universität Mannheim
Schloss Schneckenhof Ost, SO 213
68161 Mannheim
Tel.: +49 621 181–1482
Fax: +49 621 181–1579
E-Mail: oezuemerzifon

Performance Analysis of Time-Dependent Retrial Queues

Queueing systems are used in various service systems, such as call centres, health care, emergency services, and repair facilities. In many of these service systems, customers leave the queue before being served (e.g. abandonment or balking) due to a lack of patience. However, with emerging concepts such as virtual queueing and callback options, impatient users may join the system at a later time point. My research deals with the analysis of such retrial queueing systems with time-dependent and stochastic demand and capacities; and the calculation of their performance measures.