The quota rating of vendor A is the lowest. Therefore, vendor A receives a procurement proposal for 200 pieces due to the maximum lot size.

The quota rating is then recalculated. Although the quota-allocated quantity has increased to 400 for vendor A, the quota rating for this vendor is still smaller than for the other two vendors. According to this, the next procurement proposal (200 pieces) would go to vendor A again. However, as the Only once indicator is set, vendor A cannot be used a second time. The system assigns the next procurement proposal to vendor B, as this vendor has the next lowest quota rating. Therefore, the next procurement proposal is made for vendor B for 800 pieces as no maximum lot size has been set for this vendor.

With the Only once indicator, you achieve a situation where vendor A only receives one procurement proposal per week (due to the weekly grouping of the period lot size) for a maximum of 200 pieces (for example, due to limited capacity). With this type of capacity monitoring, quantities that have already been released are not taken into consideration.