When reporting measure testing results, the measure developer’s assessment of each of four measurement criteria is a matter of degree. For example, not all revisions will require extensive reassessment for all testing criteria, and not all previously endorsed measures will be strong—or equally strong—among each set of criteria. Assessment is often a matter of judgment and expertise. Given the difficulty of assessment, the expectation is for measure developers to contract or employ clinical experts in addition to experienced statisticians and methodologists to provide expert judgment when reporting measure reliability and validity. The measure testing summary should reflect expert findings/consensus with respect to the measure, including importance, scientific acceptability, feasibility, and usability and use.