Our company manufactures products.  We use QB Enterprise and assemblies. 

When the production workers are making the products we do not know the class in which they will be used; medical, household, commercial, government, etc.  We only know the class upon sale.  I'd like the production labor to show up properly in the P/L by Class Report, but I cannot figure out how to make that happen.  I put labor in the BOM for the assembly items and then assign a class on the invoice, but the underlying labor remains unclassified.

I use a service item called "Production" on the timesheet (and assembly BOM), and report expenses under "Production Wages" in the CofA.  But they remain unclassified.