For Inventory Adjustment : Which Idoc type to be used and why?

Hi Gurus,

For Goods Movement in one of the MM-Purch Implementation I used the Idoc type : MBGMCR03

at that time inventaory was not playing a big role.

But for now for doing inventory adjustment (Inventory has importance now) which Idoc type to be followed:

Can I use same Idoc type : MBGMCR03

Or Shd I go for Idoc type : WMMBID02

In some threads I read if MM you shd. go for MBGMCR03 and for IM : WMMBID02.

But why I dont know the answer...

Please give me your views on this.

Thanks

Amresh