Non-Inventory Items and Service Items should not be blocked from being manually added to the Requisition Worksheet. Many times, the Purchasing Agent needs to be able to add required supplies on the fly to the Requisition Worksheet. It is cumbersome and not fully functioning to require creating a Purchase Order for Items of Type Inventory-only from the Requisition Worksheet and then have to manually add the Items of Type: Non-Inventory or Service to a Vendor Purchase Order. Please consider giving the Purchasing Agents the ability to manually add these other Item Types. Right now, they are filtered and blocked.
It is understood that these Items of Types that are not Inventory don't have Planning Parameters to calculate a plan for supplying these - these are non-tracked supplies inventory. However, a Purchaser should be able to insert/add lines to the Requisition Worksheet for Non-Inventory Items that are required to be purchased along with regular inventory.