The purpose of this article is to explain the 2 Round Heats, Random Order line-up.
The 2 Round Heats, Random Order lines drivers up into two heats randomly. You will need an even number of heats. The line-up will put the competitors into exactly two heats but where they end up specifically will be different.
For example below is 10 drivers in two heats.
Recalculating it gives an entirely different line-up.