What is "bhavanakrama"

The Bhāvanākrama (Bhk, "cultivation process" or "stages of meditation"; Tib. སྒོམ་རིམ་, sGom Rim) is a set of three Buddhist texts written in Sanskrit by the Indian Buddhist scholar yogi Kamalashila (c. 9th century CE) of Nalanda university. These works are the principal texts for mental development and the practice of shamatha and vipashyana in Tibetan Buddhism and have been "enormously influential". The texts survive in full Tibetan translation, part 1 and 3 also survive in Sanskrit. The Bhāvanākramas are also one of the favorite texts of the 14th Dalai Lama, who has translated and written a commentary on the middle Bhk.