ABC Classification / ABC Analysis / ITEM / INVENTORY

Hi, 

We are now in the middle of classifying our inventory for ABC and I'm looking for the solution in NAV 2015. 

I have googled some and got this info:

// ABC classification isn't standard in NAV. You have to develop this yourself or look for an addon that has this function. (from 2010 so has something changed?) // 

So my question is do Navison 2015 have ABC Classification for the inventory or do I need to look for an addon or develop it myself?

I need to add this so the customer service to get a clear overview of the inventory. 

C not in stock only purchased when there is a sales order and so on.  

Thanks in Advanced. 
Daniel