▁the ▁ranks . ▁The ▁National ▁Fire fig h ter ▁Selection ▁In ventory ▁- ▁N F SI , ▁is ▁a ▁national ▁entry - level ▁exam ination ▁that ▁was ▁developed ▁as ▁an ▁alternative ▁to ▁conventional ▁fire fig h ter ▁written ▁entrance ▁exam in ations . ▁It ▁was ▁developed ▁by ▁I OS , ▁Inc . ▁or ▁Indust rial / Organ iz ational ▁Sol utions ▁Inc , ▁referred ▁to ▁as ▁I OS ▁in ▁the ▁ 2 0 0 9 ▁United ▁States ▁Supreme ▁Court ▁case , ▁Ric ci ▁v . ▁De Ste f ano . ▁Psych ological ▁testing ▁is ▁a ▁standard ▁practice ▁done ▁by ▁many ▁fire ▁depart ments ▁throughout ▁the ▁United ▁States . ▁ ▁The ▁National ▁Fire fig h ter ▁Selection ▁In ventory ▁- ▁( NF SI ), ▁when ▁used ▁as ▁a ▁pre - emp loyment ▁screen ing ▁tool , ▁helps ▁select ▁qualified ▁individuals ▁for ▁service ▁as ▁fire fig h ters . ▁A ▁fundamental ▁aspect ▁of ▁the ▁N F SI ▁is ▁that ▁its ▁testing ▁platform ▁is ▁an ▁alternative ▁to ▁conventional ▁fire fig h ter ▁written ▁entrance ▁exam in ations . ▁Util izing ▁a ▁compreh ensive ▁and ▁compens atory ▁model , ▁the ▁exam ▁ass esses ▁not ▁only ▁individuals ’ ▁cogn itive ▁ability , ▁but ▁also ▁their ▁behavior al ▁pre dis pos itions ; ▁job - related ▁att itudes ▁and ▁motiv ation . ▁The ▁National ▁Fire fig h ter ▁Selection ▁In ventory ▁displays ▁no ▁evidence ▁of ▁ad verse ▁impact ▁against ▁protected ▁classes ▁of ▁individuals . ▁This ▁alternative ▁testing ▁model ▁is ▁well ▁su ited ▁to ▁predict ▁success ▁for ▁all ▁entry -