Requisitions can be made from multiple production orders at once, from the Production Order list screen. Unlike Sales Orders, there is no column indicator on this grid to indicate which production orders do not have enough stock to complete, either for display or filtering.
When all desired orders are highlighted, click the Requisition button to load all items into the Requisition work screen, with Required Quantities calculated from the respective component Remaining quantities and any quantity on hand, committed or on order.
From here, you can select just those items you want to requisition, and change quantities, costs or vendors for any item. Save all selections to the Requisitions list where the Required Qty is greater than zero. Or if you have user security rights, Process the items immediately into new Purchase Orders for each identified vendor.
If a subassembly component item does not have enough stock to complete production due to sub-components being short, and production order was saved with the subassembly toggled to display sub-components, then the requisition will contain the sub-components to be processed into a Purchase order. If the production order was saved with the subassembly toggled to hide sub-components and there is not enough stock available, then the requisition will contain the subassembly item to be processed into another Production order.