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Analysis of a batch-service queue with variable service capacity, correlated customer types and generally distributed class-dependent service times Ghent University
Queueing models with batch service have been studied frequently, for instance in the domain of telecommunications or manufacturing. Although the batch server's capacity may be variable in practice, only a few authors have included variable capacity in their models. We analyse a batch server with multiple customer classes and a variable service capacity that depends on both the number of waiting customers and their classes. The service times are ...
Analysis of the age of data in data backup systems Ghent University
Evaluating approximate solution models for the stochastic periodic inventory routing problem Ghent University
An analysis of a batch server with variable and class-dependent service capacity Ghent University
In many studies on batch service queueing systems, the service capacity is assumed to be constant. However, this service capacity often depends on the content of the queue. In this paper, we analyse a discrete-time single server batch server queue with general inde- pendent arrivals. We distinguish two dierent classes in the arrival stream and products of both classes are added to the tail of a single queue. The single batch server can group all ...
Modeling data backups as a batch-service queue with vacations and exhaustive policy Ghent University
Analysis of the service cycle of an elevator during up-peak Ghent University
An elevator system is modelled as a discrete-time queueing system with a batch server. The elevator is described during up-peak which means that customers arrive at the ground floor and travel to higher floors. We compute the steady-state probability generating function of the service cycle of the elevator. We derive the steady-state probability generating function of the queue content and we present some numerical example of the average system ...
Sustainable lean in SMEs : a quantitative analysis into improvement actions Ghent University
Lean has established itself as the primordial approach to obtain operational excellence. Its simple and intuitive techniques focus on reducing lead time through continuous improvement, involving all levels of employees in the organization. However, the rate of successful implementations has remained low. This paper contributes to the understanding of continuous improvement in a Lean context, by analyzing a database of almost 10.000 improvement ...
Performance analysis of a discrete-time two-class global-FCFS queue with two servers and geometric service times Ghent University
System occupancy of a two-class batch-service queue with class-dependent variable server capacity Ghent University
Due to their wide area of applications, queueing models with batch service, where the server can process several customers simultaneously, have been studied frequently. An important characteristic of such batch-service systems is the size of a batch, that is the number of customers that are processed simultaneously. In this paper, we analyse a two-class batch-service queueing model with variable server capacity, where all customers are ...