There are three facet scales within each of the Clinical Personality Patterns and Severe Personality Pathology scales. Each facet scale is thought to help identify the key descriptive components of each personality scale, making it easier to evaluate slight differences in symptom presentations between people with elevated scores on the same personality scale. For instance, two profiles with an elevated score on the Borderline scale may have differences in their Temperamentally Labile facet scale scores. This would mean, for clinical treatment or assessment planning, you could have a better understanding of how quickly and spontaneously a person's mood may change, compared to others with elevated Borderline scale scores.