What are different type of outline agreements?

Outline agreement is of following two types :

Contract : Contract is a long term outline agreement between vendor and ordering party over predefined material or services over certain framework of time. There are two types of contract

Scheduling Agreement : A scheduling agreement is defined as an external agreement with the customer and having details of quantity of goods and delivery dates. This information is mentioned as schedule lines In a standard system, Schedule lines can be created with the scheduling agreement or you can also create these at later stage.