Editing Cubes in AX 2012

Hi,

Is there any manuals for editing Cubes or even creating it?

I have some cubes like sales cube, purchase cube, inventory cube etc. But they are incomplete like inventory cube is showing only on hand inventory, it is not showing inventory on a particular date and in sales cube the profit figure is coming wrong.

So I am trying to edit the cubes.

Any body has any ideas on this?

Thanks in advance.