Introduction Nowdays research and market pay attention to new software architectures like service oriented ones (SOA). These paradigms are intrinsically distributed systems, many times they are composed of federations of systems non controlled by the same organization. This often implies heterogeneous architec-tures and a not standardized semantic of communications and operations. More specific...

We investigate the presence and impact of forecast errors in the arrival rate of customers to a service system. Analysis of a large dataset shows that forecast errors can be large relative to the fluctuations naturally expected in a Poisson process. We show that ignoring forecast errors typically leads to overestimates of performance and that forecast errors of the magnitude seen in our dataset...

The traditional economics and queueing literature typically assume that customers are fully rational. In contrast, in this paper, we study canonical service models with boundedly rational customers. We capture bounded rationality using a framework in which better decisions are made more often, while the best decision needs not always be made. We investigate the impact of bounded rationality on ...

In this paper we introduce a new model of on-line problems called metrical service systems. An instance of a metrical service system is speci ed by a metric space M and a set R of requests, where each r 2 R is a subset of M . There is one server that can move in M . At every time step a request r 2 R is speci ed, and the server must move to a point x 2 r to serve the request r. We also have the...

The present study introduced a novel hierarchical hub set covering problem with capacity constraints. This study showed the significance of fixed charge costs for locating facilities, assigning hub links and designing a productivity network. The proposed model employs mixed integer programming to locate facilities and establish links between nodes according to the travel time between an origin-...