@sdp126 - otherwise yes, a workflow can modify the sales order at the item level and assign items to individual warehouses. How automated that is depends on the complexity of the workflow. A workflow can amend an individual item but doing the logic may require some scripting if you want to go out and check inventory levels. I just recently wrote a workflow with a workflowaction script. The workflow action script is standard suitescript but allows me to work with other resources not normally connected to the sales order including a couple custom record sets. I can take a value on the sales order or its items and look them up in my custom records. I can attach data from those records to the sales order and I also update the custom record with data from the sales order from within the same script. for more info on that you may want to try the suiteflow and suitescript channels of this site.