Final answer:
The statement refers to the service time distribution in the Kendall-Lee's Notation for queues.
Step-by-step explanation:
The statement "elements are served following an Erlang distribution" refers to the service time distribution in the Kendall-Lee's Notation for queues.
In the Kendall-Lee's Notation, A represents the arrival process, S represents the service time distribution, c represents the number of servers, K represents the system capacity, N represents the population size, and D represents the queue discipline.
An Erlang distribution is often used to model service times in queuing systems, where it describes the distribution of the amount of time needed to serve an element in the system.