The goal of the paper is to describe the design, development and consolidation of a measure method for the public perception of judicial performance in Brazil —the Brazilian Justice Confidence Index (JCIBrazil). Since April 2009, JCIBrazil has been published quarterly, amounting to twelve waves. The overall results point to a trend of poor assessment of the judiciary as a public service provider so that its slowness in response, its high cost and the difficult to use it. Although we have these results, the Brazilian policymakers should rely more closely on those statistics in order to align public policies to the improvement of the system. Attention must be given not only to the production of studies, research and data on the justice system, but also to the use and application of studies results and data.