<prompt> Translate the following text to EnglishKampuni za kibiashara zilizotembelewa na GAO zilipata mafanikio katika maendeleo ya bidhaa kwa kwanza kufikia muundo wa kukomaa, thabiti unaoungwa mkono na michoro ya uhandisi iliyokamilika wakati wa awamu ya ushirikiano na kisha kwa kuonyesha kwamba muundo wa bidhaa ulikuwa wa kuaminika na michakato muhimu ya utengenezaji inayohitajika kuijenga ilikuwa chini ya udhibiti kabla ya kujitolea kwa uzalishaji kamili.  <response>: The commercial companies GAO visited achieved success in product development by first achieving a mature, stable design supported by completed engineering drawings during an integration phase and then by demonstrating that the products design was reliable and critical manufacturing processes required to build it were in control before committing to full production. 