odoo is a pain for importing purchase order mostly you only have a file with sku or ean13 quantity and price
i dream for a module who can handle that
open an order with customer or supplyer information
copy from a spreadsheet sku - quantity - price
past them into the order lines
verify and correct and validate
mostly yousr coworker give you a sreadsheet with their needs they dont now the odoo internal id
it could be the same when a supplier send you a pricelist in excel or csv format
before with my 8sens software i could do that very simply
if someone has a simple solution to that he will be a saint