Each supplier can carry a reliability score, a number from 0 to 100 that you set yourself. Stokk doesn't calculate it from your purchase orders. Use it to record how far you trust a supplier to deliver on time and in full, so you can compare suppliers at a glance.
Open a supplier from Purchasing → Suppliers. The score sits in the Structured Config card, with MOQ, freight threshold, order method, currency and payment terms. Click Edit, type a number from 0 to 100 and save. Leave it empty and the supplier shows as New.
The colour follows the number: green at 90 and above, yellow from 80, red below 80. Each change is saved in the supplier's SIF history, so you can see the old value, the new one and when it changed.
Nothing updates the score for you, so revisit it when a supplier gets better or worse. If deliveries are consistently late, also fix the lead time in the supplier's Order schedule. Order suggestions use that lead time, not the reliability score.