A recent paper in Interfaces laments that "the mathematical and often abstract nature of many articles on queueing suggests that queueing theory is just that: only theory and difficult to apply in practice." It goes on to document the "limited use of queueing theory" in practice. We agree wholeheartedly with those comments, and in the present paper we will address this issue from the point of view of manufacturing applications of queueing models. Despite the fact that the analysis of queueing systems was formalized with Erlang's work at the beginning of this century, the use of queueing models in manufacturing and operations management (OM) remains limited. There has actually been a lot of progress in the research on queueing models in manufacturing, but queueing models are seldom used in industry for real manufacturing decision-making. When compared with other OR techniques such as LP or Simulation, we see that there is also a scarcity of commercially supported software packages enabling the use of queueing models for manufacturing.