Material Classification

Hello

I would like to use material classification functionality for material master.

I have created class with class type material class and then created characteristics and assigned the same to the class.I have then created the material and assigned the class and characteristic values.

Now my question is if we assign multiple characteristics values can we use them to track the material.

Ex-I have class type motor and RPM are say 2400 and 3600. Now while creating the material, in the characteristics RPM I have assigned both the values of RPM 2400 and 3600.

Now sometimes I may get motor with RPM 2400 or 3600 under the same material Code.Is there any facility in PO,GR that I can select the RPM value and so that I have stock of motor with both RPM under the same code.

Is this correct way of using the classification concept or I am missing something?