Criticism of the Work Capability Assessment group of experts — a professor of psychiatry, a consultant psychiatrist in learning disability, a professor of rheumatology, and an expert in human resources — reviewed the WCA in 2013 and concluded that "the WCA produced consistent results on the whole, and is an accurate indicator of work capability compared with expert opinion". But in the year that the study was published, the firms running back-to-work training for people on ESA said they had "ongoing concerns about the accuracy of the WCA". And in 2014, Atos announced that it had come to the conclusion that "the WCA is not working
Criticism of the Work Capability Assessment points after the tribunals had independently assessed their claims. A 2012 study of 28,000 tribunal hearings analysed the reasons for overturning the DWP's decisions: In 2013, the Work Programme firms responsible for training people in the Work-Related Activity Group said that, despite the modifications that had been made to the test since 2008, they still had "ongoing concerns about the accuracy of the WCA". Professor Dame Carol Black advised the government on back-to-work policy between 2006 and 2016. She said of the WCA: "I don't think anyone thinks it has been a success". Conversely, the DWP has said that a