CCMs on QR Airbus A330-300's:
Northern European and USA sectors - 2*
Some Asian Sectors - 2**
Other Asian Sectors - 1^
ROTW - 1***
Airbus A340-600 sectors - 2 or 3****
* On the new Performa cabin service. (LHR / CDG / MAN / MUC / EWR / GVA, etc.....)
** On the new Performa cabin service. (KIX / HKG / BKK)
^ On the old standard cabin service. (KUL / CGK / CMB / BOM / etc)
*** On the old standard cabin service. (CAI / IST / ATH / BEY / DXB / AUH / MLE etc....)
**** On the new Performa Cabin Service (although somewhat infrequent now) - supposedly a senior CCM (CSD), plus two junior CCM's (CS), looking after J and Y class cabins respectively. Most flights only go with one CSD and one CS nowadays though.