In my company we have like 600+ suppliers and no purchasing dept. i'm going with some critical suppliers (that will require evaluation), and non-critical suppliers.
I've defined critical suppliers if:
- supplier is in a monopoly situation
- supplier's product (or service) is a vital element of our product (laboratories analysis in our case, that we use to produce «environmental conformity reports» for the government)
- it is our IT supplier (all our IT is outsourced)
That way, we have «only» 50 suppliers that need evaluation and re-evaluation (which is still a lot for a company without a purchasing dept.)