What is the correct order to install vCenter Server 5.x components?
A.
vCenter Single Sign-On, Inventory Service, vCenter Server
B.
vCenter Server, vCenter Single Sign-On, Inventory Service
C.
vCenter Server, Inventory Service, vCenter Single Sign-On
D.
vCenter Single Sign-On, vCenter Server, Inventory Service
Alternatively, to customize the location and setup of each component, you can install the components separately by selecting the individual installation options, in this order: vCenter Single Sign-On, Inventory Service, and vCenter Server. Each component can be installed in a different host or virtual machine.
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2021202