Having a lot of performance issues

A unit in one organization is having a lot of performance issues and senior management is not sure of the reasons for this They don't want to fire any employees, but they do think some of the supervisors need to improve their leadership skills The survey is sent to five employees, which includes two supervisors and three direct reports. They are told that although the survey will be anonymous, the results of each survey will be shared with all five employees, the names will be removed from each survey, and they will all be able to see the evaluation scores on each question When senior management sees the survey results, they find that all five employees received almost perfect scores and no useful information from the surveys can be found