The only google hits for this phrase is this question, and a contract saying “The Supplier shall deliver the products selected and ordered by the means chosen by the Purchaser or stated on the website”. Which likely isn’t it.
If the notion is of ordering as in sorting, putting some entities in order, the means might be the statistical Means: you have a set of sets, and those sets are ordered by their means (more commonly referred to as averages); there are two google hits for “ordered by the averages”.
*shrug* It’s as good a guess as any.