The annual input-output (I-O) accounts are integrated with the GDP by industry accounts and present consistent measures of gross output, intermediate inputs, and value added by industry. These accounts were integrated as part of the 2004 comprehensive revision of the annual industry accounts in order to improve the accuracy of both sets of accounts. These accounts were used to incorporate updated source data, methodologies, and definitional changes as part of the 2010 comprehensive revision.
An article describing the integration methodology is published in the March 2004 issue of the Survey of Current Business (SCB). The article can be referenced by clicking on the following link:
http://www.bea.gov/scb/pdf/2004/03March/0304IndustryAcctsV3.pdf
An article describing the 2010 comprehensive revision can be found by clicking on the following link:
http://www.bea.gov/scb/pdf/2010/03%20March/0310_indy_accts.pdf