John Cook wrote a very succinct analysis of the problem [1][2]. It uses an analytical model instead of a simulation, which I personally found easier to underst

John Cook wrote a very succinct analysis of the problem [1][2]. It uses an analytical model instead of a simulation, which I personally found easier to understand. [1] https://www.johndcook.com/blog/2009/01/30/server-utilization-joel-on-queuing/ https://www.johndcook.com/blog/2009/01/30/server-utilization... [2] https://www.johndcook.com/blog/2008/10/21/what-happens-when-you-add-a-new-teller/ https://www.johndcook.com/blog/2008/10/21/what-happens-when-...