On 29th August 1947, the Constituent Assembly through a resolution appointed a Drafting Committee to

“..scrutinise the draft of the text of the Constitution of India prepared by Constitutional Adviser, giving effect to the decisions already taken in the Assembly and including all matters which are ancillary thereto or which have to be provided in such a Constitution, and to submit to the Assembly for consideration the text of the draft constitution as revised by the committee”

The Drafting Committee had seven members: Alladi Krishnaswami Ayyar, N. Gopalaswami; B.R. Ambedkar, K.M Munshi, Mohammad Saadulla, B.L. Mitter and D.P. Khaitan. At its first meeting on 30th August 1947, the Drafting Committee elected B.R Ambedkar as its Chairman. 

Towards the end of October 1947, the Drafting Committee began to scrutinise the Draft Constitution prepared by the B.N Rau, the Constitutional Advisor. It made various changes and submitted the Draft Constitution to the President of the Constituent Assembly on 21st of February 1948.

The Drafting Committee and its members were very influential in Indian constitution-making during the Committee stages and the deliberations of the Constituent Assembly. Majority of the debates in Constituent Assembly revolved around the Draft Constitution(s) prepared by the Drafting Committee. Out of 165 sitting of the Constituent Assembly, 114 were spent debating the Draft Constitution(s). 
 

Resources

Reports, minutes of meetings and other documentation related to the Drafting Committee can be found in Shiva Rao’s‘Framing of India’s Constitution