Reg:Future in SAP APO

Hi all (optimizers) ,

I have been working in SAP SD from the last couple of years.Have idea in MM too as part of the SD.

I would like to know , how SAP APO wil be for SD consultants.

i heard to work in APO, PP & Engg Background is required or should work on MM.

izt so?

Cant I work in SAP APO?

izt compulsory that, first I have to do SAP BI the APO?

am bit confused,plz suggest me.

I want to upgrade myself to sap new dimension modules,(other than CRM)

*all suggestion r welcome

*reward points ll be provided .