Apparently, the expression is 'sortition' not 'sortation'. wisty has a link to the relevant Wikipedia article: http://en.wikipedia.org/wiki/Sortition http://en.

Apparently, the expression is 'sortition' not 'sortation'. wisty has a link to the relevant Wikipedia article: http://en.wikipedia.org/wiki/Sortition http://en.wikipedia.org/wiki/Sortition, and a Google search for 'sortition' yields quite a few results.