Movements and Musical Structure

Many musical genres follow a multi-movement model. The succession of movements is often described as a succession of tempi. For example, the sonata genre of the Classical period is often described as a textbook template of a succession of three movements, whose tempos follow a fast-slow-fast order, respectively composed in sonata-allegro form, episodic form, and rondo.
These models become often fashionable templates, functioning as inferred traits from the actual usage by different composers in different works.
Many other aspects can also influence or even decided the musical structure of a succession of movements (for all matters and purposes one could just as well call it "songs", "pieces", "tunes", "dances" or "scenes"). For example, it could be the case that the music score is following a pre-existant narrative (as in opera, film, or tv, for example), where the narrative itself influences or sets the pace for the music, where function and cultural traditions imply a certain rate of musical events (funeral marches often go slow).