Your store already records who supplies each product — the Vendor field on the product page. SupplyRoute reads it. There is nothing to import and nothing to tag.
Point each Vendor value in your catalogue at a supplier. That is the only setup, and it takes minutes.
Every line finds its supplier. They mark it packed and shipped; tracking goes back to your customer automatically.
Goods supplied, your margin, what is due, what you settled — append-only, per supplier, and reconcilable to the order.
Said plainly, because others in this category imply otherwise.
This is a back-office tool. It does not change what a shopper sees, and it gives a supplier no way into your catalogue.
No. Almost every catalogue already has the Vendor field filled in — it is a standard product field. You map each value to a supplier once and existing orders route from day one.
No, and the app refuses it rather than picking one. If two suppliers could answer to the same value, every order for it would be credited to whichever record was read first — and the money would be wrong with nothing visibly broken.
It is flagged for you, not guessed. Nothing is ever silently attributed.
No. There is no screen, route or API for it. The catalogue is yours alone.
Their normal checkout, and one delivery experience. An optional theme block can say which supplier dispatches an item — it is off unless you add it.