Little's law - wikipedia.org  ## Metadata - Author: **wikipedia.org** - Full Title: Little's law - Category: #articles - URL: https://en.wikipedia.org/wiki/Little%27s_law ## Highlights - In mathematical [queueing theory](https://en.wikipedia.org/wiki/Queueing_theory), **Little's result**, **theorem**, **lemma**, **law**, or **formula**[[1]](https://en.wikipedia.org/wiki/Little's_law#cite_note-1)[[2]](https://en.wikipedia.org/wiki/Little's_law#cite_note-allen-2) is a theorem by [John Little](https://en.wikipedia.org/wiki/John_Little_(academic)) which states that the long-term average number *L* of customers in a [stationary](https://en.wikipedia.org/wiki/Stationary_process) system is equal to the long-term average effective arrival rate *λ* multiplied by the average time *W* that a customer spends in the system. ([View Highlight](https://read.readwise.io/read/01j683d2yptk35qyv2pz3a2q8k))