NASA technologists say cost constrains can be useful in planning moon missions. India's Chandrayan 3 cost $70 million for the moonlanding and the Vikram rover scientific research on the lunar surface. Progress is made through an incremental approach as Chandrayan 2 was based on the lessons from Chandrayan 1 which lost contact from lunar orbit, and Chandrayan 3 learning from the landing failure on the lunar surface of Chandrayan 2. This also reduces the cost of the next mission.