A general upper bound for G/G/ systems A number of bounds have been obtained for more general cases(see Section 4.9) A good example is an upper bound for the waiting time at G/G/1 systems: λ(0+) 2(1-p) (p<1) where X and S are, respectively, the r.v.'s denoting inter arrival times and service times Under some fairly general conditions, such bounds can be tightened and perform extremely wellA general upper bound for G/G/1 systems • A number of bounds have been obtained for more general cases (see Section 4.9) • A good example is an upper bound for the waiting time at G/G/1 systems: (7) where X and S are, respectively, the r.v.’s denoting inter￾arrival times and service times • Under some fairly general conditions, such bounds can be tightened and perform extremely well ( 1) 2 (1 ) ( ) 2 2 < × - × + £ r r l s X s S Wq