Procedure:

• Open Purchase.
• In Purchase, the Transactions section appears open Requisition Entries.
• Add a point of use, Narrative, Details.
• On the added requisition click on details.
• Select your supplier, business segment, branch, date.
• Select Item, Add memo, Requisition quantity, Estimate price.
• Go to Purchase → Inquiries & Reports → Purchase Requisition Inquiry. 
• Go to Purchase →  Transactions →  Requisition Allocation → Generate Purchase Order.