<prompt> Translate the following text to EnglishKatika kurekebisha mfumo wake wa usimamizi wa utendaji, kwa mfano, tuliripoti kwamba mfumo mpya wa IRS ni dhaifu zaidi katika mstari wa mbele, ambapo mwingiliano na walipa kodi hutokea.  <response>: In revamping its performance management system, for example, we reported that IRS new system is weakest at the front line, where interactions with taxpayers occur. 