<prompt> Translate the following text to SwahiliThe program also held design reviews for each of the major subsystems, allowing the program to achieve and demonstrate a stable design in July 1999, before beginning initial manufacturing of production representative prototypes.  <response>: Programu hiyo pia ilifanya ukaguzi wa muundo kwa kila moja ya mifumo mikubwa, ikiruhusu programu kufikia na kuonyesha muundo thabiti mnamo Julai 1999, kabla ya kuanza utengenezaji wa awali wa mifano ya uwakilishi wa uzalishaji. 