This discussion paper resulted in a publication in <A href="http://link.springer.com/article/10.1023/A:1020922315539#page-1">'Annals of Operations Research'</A>.<P> Queueing networks are studied with finite capacity constraints forclusters of stations. First, by an instructive tandemcluster example it is shown how a product-form modification methodfor networks with finite...</p></a>