Supplier orders, delivery notes and received invoices, linked to the warehouse and the orders.
Generate supplier orders from the stock proposal or from a repair order, send them by email as a PDF and record full or partial receipt with a delivery note, which updates stock and cost.
Record received supplier invoices and their reconciliation with delivery notes, due dates and payments, plus supplier warranties for a defective part. No bookkeeping: only control of what is paid and outstanding.