Assumption sets are collections of inputs to be used for a projection. In an assumption set, you can select one or more Table Structures along with a corresponding selection of an existing Data Tables or Decrement Tables. Assumption sets can be used to quickly set multiple inputs on a projection using the predefined set of inputs defined in the assumption set. This can be useful for setting up business groupings of inputs that belong together and should be used in conjunction with one another. It is also useful for organizing assumptions in groupings that make sense from a business management point of view.