Busniess Intelligence Development Studio

try this:

http://www.microsoft.com/download/en/details.aspx?id=19413

if you have SQL Server 2008 Express, follow this link:

http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=1842

if you have installed from a CD/DVD than you have to go to the advance options and select what needs to be included.