Hi Edith,
If you want to order 15 pieces in total, but want to receive a partial receive 6 pieces into inventory:
In the Item line, put 15 in the Quantity field then qty to receive and qty to invoice will be autofill 15 by default but you can edit qty to receive by 6 once you out of the field the qty to invoice will be autofill as 6 then there are 2 scenarios if you want to receive and invoice the partial quantity at the same time or you want to partially receive first and partially invoice later
Here are two situations
1. Receive and Invoice partial quantity at the same time
a. you just fill the Vendor Invoice No. in Purchase Header on Purchase Order page. click on Posting->post-> receive and Invoice
b. The quantity received and quantity invoiced will be filled by 6 and the qty to receive and qty to invoice will be 9 that is the remaining quantity.
2. if you want to receive the partial quantity now and want to make an invoice later
a. Do not fill the Vendor Invoice No. and just add the quantity 6 that you want to receive and then go to Posting->Post-> Receive
b. once you receive it then the quantity received will be updated to 6 and remaining quantity will be present on qty to receive will be 9 and qty to invoice will be 15
c. if you received an invoice from the vendor then just enter the Vendor invoice no and make qty to invoice 6 and then click on Posting-> Post-> Invoice
d. the system will bill the 6 pieces which was received earlier.
once the entire quantity is received and invoiced the Purchase order will be deleted from the Purchase Order List Page.
please verify the answer if your question is been answered.