The NITI Aayog's analysis of the Union Budget 2015-16 highlights significant shifts in resource allocation, emphasizing capital expenditure over revenue expenditure to address infrastructure deficits. The budget sees an increase in internal and extra-budgetary resources and raises sectoral funding for areas such as rural infrastructure, agriculture, and urban rejuvenation. Challenges ahead include stimulating private investment and effectively managing public projects to avoid delays and cost overruns.