Digital computers have been widely used for solving queueing problems. However, when the complexity of the problem increases the computational time and cost rise exponentially. A hybrid computer approach has been developed where the rise in cost caused by the complexity of the problem is...

Estimation of ([alpha], [beta])' in the doubly geometric model Zij = [alpha]Zi - 1, j + [beta]Zi, j - 1 - [alpha][beta]Zi - 1, j - 1 + [var epsilon] cases (i) [alpha] = 1,|[beta]| 1 and (ii) [alpha] = [beta] = 1. In each case, the "one step Gauss-Newton estimator" is shown, when properly...