Server pooling models for separate and bounded queues.

The focus of this paper is on queueing models with arrivals from several sources, where the number of waiting spaces for each arrival source is finite. The main distinction from prior studies is that in our models waiting spaces are separate. Within this context, we examine the benefit of pooling, regardless of whether arrival rates are equal or different.

Setting process control chart limits for rounded-off measurements.

Measurements can often be imprecise and subjected to rounding-off. Typically, this rounding-off is ignored and assumed to have little to no effect. However, when the measuring scale step is not negligible, it may affect statistical control tools such as -chart.