Options/variation on an assembly drawing

Hi,

How are you guys managing drawing where you have parts where you do not know in advance which one will be installed?

For exemple, shims.

We have an assembly drawing in which we must install shims. We buy the shims in different thicknesses and each thickness get a part number (MEC-1602-1, MEC-1602-2, etc).

Currently I write MEC-1602-X in the assembly Parts List with a note saying "Install shim as required" but I do not feel this is an elegant solution.

Would you have better solutions that you apply in your business?

Regards,

Flo

SolidworksDrawings And Detailing