Tone Production

Resonance and timbre are appropriate for the style, clarity of onsets and offsets, etc.

Technique

The degree to which the performer has acquired control of the voice (appropriate to age)

Diction

Accurate pronunciation and effective articulation

Intonation

Tuning is accurate throughout the range.

Interpretation

Thorough and demonstrated understanding of the text.

Phrasing

Dynamic flexibility as appropriate to the style and composer intent (music markings).

Accuracy

Pitches and rhythms are performed precisely.