This IDC Forecast Update revises IDC forecasts by offering an additional postcrisis analysis of the worldwide and U.S. business consulting market as previously reported in Worldwide and U.S. Business Consulting Services 2009-2013 Forecast (IDC #218122, April 2009) and Worldwide and U.S. Business Consulting Services by Service Line 2009-2013 Forecast (IDC #218171, May 2009).