Improvisation - The ability to create new motifs, melodies, and rhythms that are suggested by the harmonic structure (chord progression) of the composition.

Tone Production - The ability to achieve a quality of sound appropriate to the instrument and to the style of the music.

Technique - The degree to which the performer has acquired control of the instrument.

Rhythm - The ability to establish, maintain, and project rhythms with a wide range of complexity.

Intonation - It's important to properly tune your instrument and to play in tune.

Interpretation - the ability to project a convincing conception of the selection.

Phrasing - Sensitivity to the need for phrasing and the ability to execute it.

Presentation - The ability to make a connection with the audience and interact with the audience.