16 citations · 38 across the 9 of their papers we have counts for
9 papers
Stability of queueing-inventory systems with different priorities
Sonja Otten, Hans Daduna
We study a production-inventory system with two customer classes with different priorities which are admitted to the system following a flexible admission control scheme. The inven…
The Weber Problem in Logistic and Services Networks under Congestion
Vanessa Lange, Hans Daduna
We investigate a location-allocation-routing problem where trucks deliver goods from a central production facility to a set of warehouses with fixed locations and known demands. Du…
Exponential single server queues in an interactive random environment
Sonja Otten, Ruslan Krenzler, Hans Daduna +1
We consider exponential single server queues with state-dependent arrival and service rates which evolve under influences of external environments. The transitions of the queues ar…
Alternating birth-death processes
Hans Daduna
We consider a continuous time Markov process on which can be interpreted as generalized alternating birth-death process in a non-autonomous random environment. Depen…
Lost-customers approximation of semi-open queueing networks with backordering -- An application to minimise the number of robots in robotic mobile fulfilment systems
Sonja Otten, Ruslan Krenzler, Lin Xie +2
We consider a semi-open queueing network (SOQN), where a customer requires exactly one resource from the resource pool for service. If there is a resource available, the customer i…
Heuristic Approximations for Closed Networks: A Case Study in Open-pit Mining
Hans Daduna, Ruslan Krenzler, Robert Ritter +1
We investigate a fundamental model from open-pit mining, which is a cyclic system consisting of a shovel, traveling loaded, unloading facility, and traveling back empty. The intera…
Correlation formulas for Markovian network processes in a random environment
H. Daduna, R. Szekli
We consider Markov processes, which describe e.g. queueing network processes, in a random environment which influences the network by determining random breakdown of nodes, and the…
Randomization for Markov chains with applications to networks in a random environment
Ruslan Krenzler, Hans Daduna, Sonja Otten
We develop randomized modifications of Markov chains and apply these modifications to the routing chains of customers in Jacksonian stochastic networks. The aim of our investigatio…
Loss systems in a random environment
Ruslan Krenzler, Hans Daduna
We consider a single server system with infinite waiting room in a random environment. The service system and the environment interact in both directions. Whenever the environment…