This paper introduces a numeric measure of course rigor as it pertains to grade distributions. The nature of this key performance indicator (KPI) is described in detail, along with statistical tests indicating that instructors of classes with rigorous grade distributions need not necessarily fear retaliation in the form of low student evaluation scores. The paper also describes ways in which the administrators have used the KPI to reinforce expectations for rigor in grading practices and to recognize rigorous instructors. The KPI and practices related to it are offered as counter weight to forces which might encourage lenient grading practices.