For a collection of Markov chains the aggregated process, that is a process for which the transition rates are a mixture of the transition rates of the Markov chains in the collection, is introduced. A sufficient condition is given, called cross-balance, a generalization of global balance to a...

In contemporary railway traffic, different train services often run on the same track of a railway section. Since these train services generally travel at different speed, this may result in delays due to fast trains being caught behind slower ones. This note investigates these delays developing...

Chapter 1. Making an impact on healthcare logistics -- Part I: Overview of the state-of-the-art -- Chapter 2. A survey of literature reviews on patient planning and scheduling in healthcare -- Chapter 3. Theoretical and practical aspects of outpatient clinic optimization -- Chapter 4. Robust...