For direct material purchase, Auto OEM use supplier schedule instead of Spot-by PO or Blanket PO. OEM use annually agreement (Price) + weekly rolling schedule ( Due date + qty), OEM call this release management, and these supplier schedules transfered to TIER1 via EDI (830/DELFOR for Supplier planning schedule, and 862/DELJIT for supplier shipping schedule).

Another issue is, OEM normally have 2-3 suppliers for one part, and a percent combination for these suppliers (30%A+40%B+30%C).  After MRP running, the A/B/C supplier will receive supplier schedule of each percent automatically.

So how to realize supplier schedule and MRP% in Odoo?  Thanks.