text: PCIE standards place upon GAO and its investigators the responsibility to ensure that ( 1 ) investigations are conducted by personnel who collectively possess the required knowledge , skills , and abilities to perform the investigations , ( 2 ) judgments made in collecting and analyzing evidence and communicating results are impartial , and ( 3 ) due professional care ( e.g.
  
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  PCIE standards for GAO makes sure investigations are done by personnel who have the skills needed