You need to plan before you configure Web Analytics Service Application for SharePoint.
Why? The reason is simple, and Joel Oleson explains the reasons on this blog: http://www.sharepointjoel.com/Lists/Posts/Post.aspx?ID=515
The issues have not improved on SharePoint 2013. Check this out: http://www.sharepointjoel.com/Lists/Posts/Post.aspx?ID=655
My client obviously wanted to have Web Analytics to get information about their web pages when I was on vacation. So they configured the Web Analytics with a SharePoint Developer.
But they couldn’t open it because it was greyed out. So they thought everything went wrong and SharePoint isn't working, and they can’t get data …
But you have to start first by adding the 2 services “manually”:
Second, you can get data/reports by:
Ed Price - MSFT edited Original. Comment: Converted to third person perspective. Updated grammar and clarity. Updated title to title casing and added clarity. Added tag.
Thanks Ed!