Rick Altman identifies four ways that genre can be understood: as a blueprint that guides film production, as the formal structure that individual films are based on, as the label used to categorize films for distribution and exhibition, and as the viewing experience that audiences expect from a particular genre. He argues that major film genres can be defined by a group of films that satisfy these four aspects - they follow an established production formula, have common structural elements, are distributed under a consistent genre label, and are interpreted by audiences based on the associated genre.