Rate Routing 
Definition
A routing for whose operations the production quantity and a fixed duration has been defined. Thus the production rate is also defined.
Use
Rate routings are used when you plan on a quantity basis, for example in repetitive manufacturing.
Structure
A rate routing has the same structure as a routing. You can assign a rate routing to a material to be produced. It can have parallel sequences .
Integration
You can include reference rate routings in a rate routing as often as you like and in any order to reduce the amount of input.