APO DP key figures forecast

Hello,

can anybody explain the different key figures for forecast:

e.g.

9ADFCST statistical forecast

9AAFCST sales forecast

9AREVFC sales revenue forecast

9APPROD logistics forecast

9AMANUP final forecast

9AADDKF4 forcast deviation

9AADDKF5 customer forecast

What is the difference?

Where does the information/values come from?

Thanks,

Michael