A method usually contains fingering charts or tablatures, etc., scales and numerous different exercises, sometimes also simple etudes, in different keys, in ascending order as to difficulty (= in methodical progression) or with a focus on isolated aspects like fluency, rhythm, dynamics, articulation and the like.
Detailed instructions in this respect are only found in special, autodidactical methods.
Some methods are especially tailored for students on certain skill levels or stages of psychosocial development.
In contrast, a 'complete' method (sometimes in multiple volumes) is meant to accompany the student until he or she becomes an advanced player.
Methods of certain authors or editors have achieved the status of standard works (reflecting regional and cultural differences) and are published or reissued by different publishing companies and in diverse (new) arrangements.