Diagnostic testing: Analysis of various functions of the components and systems of a vehicle to determine if they are operating properly or have recorded faults which have to be rectified. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostDeparture angle Next PostDiagnostic trouble code