Get Erlang B Model

An Erlang is a unit of telecommunications traffic measurement. One Erlang is the continuous use of one voice channel. In call minutes, one Erlang is 60 min/h, 1440 call min/24 h. In practice, when doing mobile capacity calculations, an Erlang is used to describe the total traffic volume of 1 h, for a specific cell.

The Erlang model is used in telephone traffic modelling to determine the required number of staff based on the forecast workload for incoming calls, together with other variables such as desired service level (percentage of calls answered within a given number of seconds).

The Erlang B formula (or Erlang-B with a hyphen), also known as the Erlang loss formula, is a formula for the blocking probability that describes the probability of call losses for a group of identical parallel resources (telephone lines, circuits, traffic channels, or equivalent), sometimes referred to as an M/M/c/c ...

A simple queuing model Erlang C model describes the probability of all the N agents are occupied or customers queuing for the service under the conditions that traffic arrival rate, average service time and N parallel agents are given.

The Erlang C formula provides a way to calculate the probability that a caller waits for an agent, given a particular traffic intensity and the number of available agents. Erlang C is a traffic modeling formula.

In the telecom industry, the Erlang B theory is used to design and dimension communication systems, as well as to predict their performance and capacity. It is often used in conjunction with the grade of service (GoS), which is a measure of the probability that a call will be blocked due to insufficient resources.

The Erlang B formula (or Erlang-B with a hyphen), also known as the Erlang loss formula, is a formula for the blocking probability that describes the probability of call losses for a group of identical parallel resources (telephone lines, circuits, traffic channels, or equivalent), sometimes referred to as an M/M/c/c ...