This method generates report about system level statistics such as
Scheduling scheme, Start Time, Duration, Communication Delay, and Waiting
time, etc..
Only one method should be used in a new workload scheme, each time it is called it
will return an array which contains the following information in order
JobClassID, Arrival Rate, Iterations
For example, producing a collection of 100 numbers by invoking this method 100 times,
will produce a collection of numbers that conform to a specific
probability distribution.