5.7 Hypercube performance measures for the zero-line-capacity case Suppose that we wish to derive hypercube performancemeasures for the case in which customers cannot enter a queue; they are either lost or, more likely, are handled by a backup system if they arrive when all N servers are busy.

  1. Argue that in this case, (5.35) is replaced by

  2. Argue further that the quantities found in (5.36)-(5.38), and (5.41)-(5.44) can be determined for the zero-line-capacity case by setting PQ = P'Q = 0 in these equations and by replacing with fnj from (*).
Note: The resulting equations can be used either with the exact or the approximate hypercube model.