Agner Krarup ERLANG. b. 1 January – d. 3 February Summary. Erlang’s work provided the methodological framework of queueing. The foundation of any good call center outsourcer is a proper understanding of Erlang and thus queueing theory. Agner Krarup (AK) Erlang. Agner Krarup Erlang Source for information on Agner Krarup Erlang: Science and Its Times: Understanding the Social Significance of Scientific.

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A distant family relation provided free accommodation for him while he prepared for his university entrance examinations at the Frederiksborg Grammar School.

For a call center looking to maximize agent utilization, these concepts resonate strongly with FCR. Leave a Reply Cancel reply Your email address will not be published.

Agner Krarup Erlang, Danish mathematician, c at Science and Society Picture Library

He maintained his interest in mathematics, and received an award for a paper that he submitted to the University of Copenhagen. Friends found him to be a good and generous source of information on many topics. By the time he was 16 his krarhp wanted him to go to university but money was scarce.

November Learn how and when to remove this template message. His early work in scrutinizing the use of local, exchange and trunk telephone line usage in a small community to understand the agnet requirements of an efficient network led to the creation of the Erlang formulawhich became a foundational element of modern telecommunication network studies.

This paper contained formulae for loss and waiting time, which are now well known in the theory of telephone traffic. He went to work for this company in as scientific collaborator and later as head of its laboratory.

After graduating in with mathematics as his major subject and physics, astronomy and chemistry as secondary subjects, he taught in schools for several years. Evenings were often spent reading a book with Frederik, who would read it in the conventional way and Agner would sit on the opposite side and read it upside down.

His also wanted to figure out how many telephone operators were needed to handle a given volume of calls. He was not highly sociable, he preferred to be an observer, and had a concise style of speech. Erlang has been successfully implemented in contact centers and phone systems for kraeup 20 years with reported uptimes of 9-nines, which is frankly unbelievable.


His father, Hans Kragup Erlang, was karrup village schoolmaster and parish clerk. This article includes a list of referencesrelated reading or external linksbut its sources remain unclear because it lacks inline citations. Erlang at once started to work on applying the theory of probabilities to problems of telephone traffic and in published his first work on it “The Theory of Probabilities and Telephone Conversations” [1] proving that telephone calls distributed at random follow Poisson’s law of distribution.

Jensen persuaded Erlang to join the telephone company and find a solution to the problem of waiting times for telephone calls. He had a brother, Frederik, who was two years older and two younger sisters, Marie and Ingeborg. Born in in Lonborg, Jutland, Denmark, Erlang showed early promise in mathematics. Inhe published The Theory of Probabilities and Telephone Conversations which introduced the world to the concept of phone queueing theory which gave rise to Erlang.

He was known to be a charitable man, needy people often came to him at the laboratory for help, which he would usually give them in an unobtrusive way.

Understanding Erlang and Queuing Theory

His significant publications include:. He returned to Lonberg and taught at his father’s school for two years. That was the height of technology at the time. These and other notable papers were translated into English, French and German. While working for the CTC, Erlang was presented with the classic problem of determining how agnerr circuits edlang needed to provide an acceptable telephone service.

His formula for the probability of loss was accepted by the British Post Office as the basis for calculating circuit facilities. He never married and often worked late into the night. A distant relative provided free board and lodging, and Erlang prepared for and took the University of Copenhagen entrance examination inand passed with distinction. For more information about Erlang and its uses, I would recommend the following reference kraru; He was an associate of the British Institution of Electrical Engineers.

His krarhp work on the characteristics of telephone networks was soon adopted by telephone companies throughout the world, and his name lives on as the unit used to measure telephone traffic.

Agner Krarup Erlang

He is credited with being one of the early creators of queuing theory and is often cited as the father of Erlang measurement. Without kraurp knowledge it would be a challenge to say the least for designers to establish the necessary trunk group sizes for their networks to be efficient and scalable.


Discover the early days of the telephone A few years later, he studied mathematics and natural science at Copenhagen University, where he developed a fascination for problems of geometry. His work on probability theory led him to join the Mathematical Association, where he met Johan Jensen, chief engineer at the Copenhagen Telephone Company.

Erlang devoted all his time and energy to his work and studies. Agner Krarup AK Erlang was a Danish pioneer of the kraryp of telecommunications traffic in the early s. He was the son of a schoolmaster, and a descendant of Thomas Fincke on his mother’s side.

If you continue without changing these settings you agree to this. While working for the Copenhagen Telephone Exchange, he sought to solve the problem of determining how many circuits were needed to provide an acceptable phone service to a local village. Today, Erlang has become an accepted unit of telecommunication traffic measurement, and not only is it still in use today but oftentimes it is the underlying formula residing in some of the more popular workforce management systems being utilized across the world.

At its basic core, an Erlang represents the continuous use of a single voice path. He was a member of the Danish Mathematicians’ Association through which he made contact with other mathematicians including members of the Copenhagen Telephone Company. One of its most essential is the ability to work out how many phone lines are going to be needed between a phone system and a central office, or even between multiple network locations, assuming potential volume influx or outflow requirements.

During this time he kept up his interest in mathematics, and he received an award for an essay on Huygens ‘ solution of infinitesimal problems which he submitted to the University of Copenhagen. He published his first paper on these problems The theory of probability and telephone conversations in Can you beat our games? In he gave a formula for loss and waiting time which was soon used by telephone companies in many countries including the British Post Office.

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