<prompt> Translate the following text to SwahiliA key measure of design stability was stakeholders agreements that engineering drawings were complete and supported by testing and prototyping when necessary.  <response>: Kiwango muhimu cha uthabiti wa kubuni ilikuwa makubaliano ya wadau kwamba michoro ya uhandisi ilikuwa kamili na kuungwa mkono na kupima na prototyping wakati inahitajika. 