Erlang's formula - Erlang's formula

Japanese: アーランの公式 - あーらんのこうしき
Erlang's formula - Erlang's formula

…The probability of encountering a busy line due to a lack of lines is called the call loss rate, and it is reasonable to reduce the number of lines to a range where this rate is, for example, 1/100 or less. Erlang's formula was used to calculate this call loss rate. Erlang's formula also holds true even if the service time distribution is not limited to an exponential distribution, but it is not easy to prove this. …

*Some of the terminology explanations that mention "Erlang's formula" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…途中回線の不足のため話中に出会う確率を〈呼損率〉と呼ぶが,それがたとえば1/100程度以下になる範囲で回線数を少なくするのが合理的である。アーランの公式はこの呼損率を計算するものであった。アーランの公式は,サービス時間分布を指数分布に限らなくても成立するが,それを示すのは簡単ではない。…

※「アーランの公式」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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