Oh no! Not another figure to look at when analyzing performance test results! Most performance tools already report a bunch of them (e.g., average, min, max, percentiles...), which we have to review for our report; why add a new metric to the list?
Actually, the Coefficient of Variation (CoV) stands out as a valuable metric to prove that your application will perform reliably under various conditions. In this article, we will explore the benefits and usage of the CoV in software performance testing, specifically when measuring response times, and look at how it is reported in Apache JMeter.