What is the name for the set of preliminary drawings or sketches used to plan or outline an animated film?

The set of preliminary drawings or sketches that are used to plan or outline an animated film is define as production. It is anything that is used in the creation of an animated film, TV shors, feature, etc. However, some collectors dfine Production more narrowly; as art that appeared on screen usin "Pre-Production" to serve as an indication of all the art that came before that.