1. A method for software processing, comprising: accepting quality information comprising names of elements of software code and respective quality indications regarding tested acceptability of the elements; processing the names to extract a list of substrings that occur in the names; assigning respective metrics to the substrings responsively to the quality indications of the elements in whose names the substrings occur; and presenting at least some of the substrings to a user in accordance with the assigned metrics, wherein the quality indications are indicative of known faults in the respective elements, and wherein the quality indications are indicative of the known faults in the respective elements that were expected to be initially found by a first testing phase but were initially found by a second testing phase subsequent to the first testing phase.