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The tradeoff between the low mean response time of the T1 policy
and good static robustness of the T2 policy
motivates us to introduce multi-threshold allocation policies:
T1T2 and ADT policies.
The T1T2 policy places a threshold on each queue,
while the ADT policy places two thresholds on queue 1
as well as a threshold on queue 2.
We will study how the mean response time and static robustness
of these multi-threshold allocation policies
compare to that of the single-threshold allocation policies.
Static robustness and mean response time of multi-threshold allocation policies