Process order operation

Hi

In Process order we are using Operation & Phases in master recipe.

Standard values are giving to phases only.

Individual Confirmation (COR6) are performing using Phases only..

Process instructions are also giving to phases only.

For creating phases operation is required( superior operation)

Just i want to know where these operations will be used in a process order other than this.

I want to know the difference between Primary & Secondary resource and their application in Process order..as these terms are not there in REM/Discrete Mfg..

Regards,

srihari.