If appropriate, performance mea- sures based on outcomes should adjust for relevant clinical characteristics through the use of appropri- ate methodology and high-quality data sources. 2. Measure selection: The patient group to whom the measure applies (denominator) and the patient group for whom con- formance is achieved (numerator) are clearly defined and clinically meaningful. Exceptions and exclusions are supported by evidence. The measure is reproducible across organizations and delivery settings. Face validity The measure appears to assess what it is intended to. 2e. Content validity The measure captures most mean- ingful aspects of care. Construct validity The measure correlates well with other measures of the same aspect of care. 3. Measure feasibility: The data required for the measure can be obtained with reasonable effort and cost. The data required for the measure can be obtained within the period allowed for data collection. Actionable Those held accountable can affect the care process or outcome. The likelihood of negative unintended consequences with the measure is low.