purchase to order (PTO):
"The method used to respond to demand in which an item is purchased only when required by a customer order that specifies that item, and not for processing or assembling into a different item number. "

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Definitions of terms related to purchase to order (PTO):

• Blanket order
• Conomic order quantity
• Customer order
• Engineering change order
• Firm planned order
• Make or buy analysis
• Manufacturing order
• Open order
• p chart
• Period order quantity
• planned order
• planned order receipt
• planned order release
• Planned orders
• production order
• purchase order
• purchase price variance (PPV)
• purchase to stock (PTS)
• purchase-to-pay cycle
• Shop order
• Standing orders
• work order