Standard Purchase Order	Planned Purchase Order	Blanket Purchase Agreement	Contract Purchase Agreement
Terms and Conditions Known	Yes	Yes	Yes	Yes
Goods or Services Known	Yes	Yes	Yes	No
Pricing Known	Yes	Yes	May Be	No
Quantity Known	Yes	Yes	No	No
Account Distributions Known	Yes	Yes	No	No
Delivery Schedule Known	Yes	May Be	No	No
Can be Encumbered	Yes	Yes	Yes	No
Can Encumber Releases	N/A	Yes	Yes	N/A