Most championship events decide who gets the pick of last rock (the hammer) with a last stone draw (LSD). At the end of each team's practice period, two different players throw draw shots - one clockwise and one counter-clockwise. An official measures the distance of each rock to the pin and adds 5.6 inches. If the rock covers the pin, a formula determines the distance. If the rock misses the house, the measurement is 78.6 inches. The sum of the two measurements is the LSD.
The average LSD (discarding the highest one) for a team is its Draw Shot Challenge (DSC). Other factors being equal, this can determine seeding within playoffs.