Custom Validations on Standard Fusion Fields

Hi Experts,

We are building a custom VBCS extension in which the Supplier will upload Quality Inspection documents for Items against a Purchase Order and submit them for approval. The Buyer will then be notified and will review these documents and provide approval, allowing the Supplier to proceed with ASN creation and shipment for the PO.

As part of the document inspection process, the Buyer will enter the Approved Quantity on a custom page for each PO Line.

The requirement is to ensure that:

• The Supplier cannot ship more than the Approved Quantity while creating the ASN.
• In case of direct PO receipt (without ASN), the store personnel must also be restricted from receiving more than the Approved Quantity.