ASL sourcing rules

Content

Scenario : 

Item A has 3 potential negotiated suppliers with source agreements defined on approved supplier list : 

Supplier X : Agreement 1 

Supplier Y : Agreement 2

Supplier Z: Agreement 3

Requisitions now start to be sent through interface for item A with no source agreement defined.

The goal is to have : 

20% of requisitions sourced from supplier X (agreement 1)

30% of requisitions sourced from supplier Y (agreement 2)

50% of requisitions sourced from supplier Z (agreement 3)

 

is it feasible to define somewhere source rules for approved suppliers so than once requisitions are sent through interface a % of it get assigned to respective agreements ?