We buy our products from a few different suppliers. The products may be a number of brands from one supplier. Is their a way to label the vender as the brand and other way field somewhere that you can list the supplier. It would be really handy to be able to sort via the supplier when making orders. I know I could do this through tags but then related products and other things get messed up as that is what they are based off of.
It depends on how you create your purchase orders. If you are talking about filtering through admin it might not be ideal as doesn't give you many options. Perhaps generating a report for each vendor based on a restock level would give you better information.