The ten thaat system aka "Dashamel Paddhati" was created by Pandit Bhatkhande which can be found here. It was derived from Vyankatmakhi's book "Chaturdadiprakashika" and a selective 10 Thaats from a total of 72 thaats, from the Karnatak Music system. Pt. Bhatkhande knew that these 10 thaats would be insufficient to completely and appropriately classify North Indian Classical Music. Due to this he incorporated the Raganga Paddhati along with the "Thaat Paddhati" to explain the thaats. He had the foresight to see that new raagas could be discovered in the future which is why his system allowed new thaats to be introduced to his thaat database. 90 years after the introduction of this thaat system there have been many new or mixed raagas discovered that have been either difficult or impossible to classify in either if the methods. That is why one should welcome new thaats.

This same thought can be seen in Pt S N Ratanjankar's book "SangeetParibhasha" published in 1973. He established and explained 32 thaats. Unfortunately not only was that explaination not widely accepted, but it is virtually unknown today even among musicologists, artists and teachers. People probably thought this 32 Thaat system to be over ambitious. Still, his 10 thaat addition has proved very useful since. Thus Shri. Chaitanya Kunte has taken Bhatkhande's and Ratanjankar's formulas forward. Instead of the 10 and 32 thaat systems, he has put forward a 24 thaat system that is most convenient. It has Pt. Bhatkhande's 10 thaat and 12 new mixed thaats totaling an overall 24 thaats.