t— In this paper we map test results from a real ASIC project on to the file structure of the design under test andpresent it as a cityscape. In the cityscape each house is a file where its height reflects the number of commits to that file. Thecolor reflects the fraction of bad commits.We identify error prone areas (red "bad" neighborhoods) as well as the most active areas (tall "downtown" areas). Thecityscape also allows us to identify potential test coverage holes (tall green buildings) where there are a lot of activities but nofailures.