[Service name] Visual Studio Team Foundation Build Service Host (if Team Foundation Build is installed) [Service account] TFSBuild [Logical Tier] 
build computer
a p p l i c a t i o n t i e r
b u i l d c o m p u t e r
a n y c o m p u t e r
t e s t c o m p u t e r
d a t a t i e r