DELAYED EXPONENTIAL CALLS SERVED IN RANDOM ORDER 371 



i 



> 



A 



=! 0.01 



<^ ft 



C ^ 



a 



0- 4 



II 



0.001 



10 



t/h 



15 20 25 30 35 40 



DELAY IN MULTIPLES OF AVERAGE HOLDING TIME 



Fig. 

 c = 2. 



Delayed traffic served in random order, exponential holding time^ 



scheme, delay results are obtained nearly as good as those realized by 

 the proi'ision of 20 storage circuits (Curve B). 



WORKING CURVES 



The adequacy of the Riordan theoiy when delayed exponential calls 

 are served at random is believed to have been established and that it 

 may be used with confidence to solve those practical problems where 

 the underlying assumptions are well satisfied. 



For working purposes, curves showing distributions of delays expected 

 for occupancies up to a = 0.90 and for group sizes of c = 1, 2, 3, 4, 5, 

 6, 8, 10, 20, 50 and 100, are shown in Figs. 8 to 18. These are plotted in 

 the customary fashion with delay in multiples of average holding time 



