Configurable Drag and Drop in Enhanced Workbench

Summary:

Can we configure the OTM (agent) action that is triggered when you drag an object from one pane to an object in another pane?

Content (please ensure you mask any confidential information):

Our customer has requirement that the carrier should add license plates to a shipment after tender approval. The license plates are for the tractor/rigid, and optionally trailer and second tractor in case of trailer swap. Because Fleet Management is not used, the license plates will be entered as refnums. Also, the shipment equipment can't be used as multiple license plates must be stored.

Instead of entering the license plates as free text in a refnum, the carriers should be able to select them from a list (database) of his own plates. Assuming these license plates will be set up as Equipments (or Locations, Items, in a non-functional way), would it be possible to configure a drag-and-drop functionality in the Workbench, to select an Equipment and drop it on a Shipment, that the resulting action would be to add a Shipment Refnum with the value of the Equipment ID?