Erlang distribution

The Erlang distribution is a probability distribution developed by A. K. Erlang to predict waiting times in queuing systems, particularly in the case of telephone traffic engineering.

There are two commonly used versions of the Erlang distribution, depending on the traffic assumptions modelled:

• Erlang B distribution
• Erlang C distribution

The Erlang B and C distributions are still in everyday use for traffic modelling for applications such as the design of call centers.

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See also:

• gamma distribution
• Coxian distribution[?]

External links

• Erlang Distribution (http://www.xycoon.com/erlang.htm)
• An Introduction to Erlang B and Erlang C by Ian Angus (http://www.angustel.ca/reports/Erlang%20B%20&%20C.PDF) (PDF Document - Has terms and formulae plus biography)