From 2004 to 2016, the Union Finance Ministry used to table in Parliament what is known as the mid-year economic review.
The purpose of this document, which was usually released in December and was drafted by the Chief Economic Advisor, was to assess the domestic and global macro-economic conditions, and the performance of the central government in terms of revenue and expenditure in the first half of the year (April-September). The finnace ministry would then determine how all this would impact the targets laid out in the previous budget, including fiscal deficit and gross domestic product.
Former CEA Arvind Subramanian