If the service system generates customers according to a Poisson distribution,the exponential distribution describes the probability that the next customer will arrive in the next T time periods.

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The exponential distribution is often used to model the interarrival time between customers in a Poisson process. Therefore, the probability that the next customer will arrive in the next T time periods can be described by an exponential distribution.

If the Service System Generates Customers According to a Poisson