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st: Stata License Rules


From   "Feiveson, Alan H. (JSC-SK311)" <alan.h.feiveson@nasa.gov>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Stata License Rules
Date   Thu, 15 Oct 2009 13:19:37 -0500

Hi everyone - I'm curious to know how any of you have addressed the following issue regarding number of users for a Stata license.

We recently acquired Stata 11 for a 9-user site license (Johnson Space Center). However we actually have more than 9 people who have Stata installed, but I been told that this is OK as long as no more than 9 people use it at one time. My question is at what point do we need to increase our maximum number of users? Right now, we have three people who use it for most of each working day, about two others who use it maybe one-third to one-half of the time, one with about 10% usage and about 6 others who have it installed but rarely use it. Given a mix such as this, does Stata have some criterion that would signal the need for an increase in the maximum number of users? Obviously there is no way to really tell how many people are using it at one time, although in our case, I would guess it's always less than 6.

One way would be to assume some distribution of user entry and exit times and then calculate the probability that more than 9 people would be using Stata at the same time. Then if this probability is greater than some threshold, increase the license capacity. Of course if this probability is anything greater than zero, Stata might not like that, but then the only way to absolutely guarantee no more than N simultaneous users is to restrict Stata to N machines. Clearly we don't do that.
 

Al Feiveson

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