Erlang Distribution

Erlang is a convolution of exponential samples. Thus Erlang 1 (K=1) is the same as exponential. Erlang 2 is a very left skewed bell chopped at 0. As K increases the shape moves towards normal but never samples < 0.

In Simul8 it is commonly used for Mean-Time-To-Repair (MTTR) reflecting its common usage for that in manufacturing. Otherwise, it is used as an extension of the Exponential distribution for any sort of durations, such as between arrivals.

See Also