How to Resolve Item Substitution Failures in Oracle Fusion Order Promising

Item substitution can fail even when the substitute is visibly on hand. One useful lesson from an Oracle Fusion SCM Course is that stock visibility alone does not authorize a replacement. Order Management must permit substitution on the order, Product Information Management must hold a usable substitute relationship, and Global Order Promising must find eligible supply under its promising and sourcing logic. A break at any layer can leave the requested item unchanged or return a later date instead of the expected alternative.

Troubleshooting is fastest when the exact behavior is named. Did Check Availability omit the substitute, did scheduling retain the original item, or did submission fail later? Capture the customer, requested date, warehouse, quantity, unit, and order-line settings, then test the same pair under controlled conditions. A broad failure report hides whether the problem concerns eligibility, data freshness, supply, or fulfillment processing.