<prompt> Translate the following text to EnglishKampuni za kibiashara zinazoongoza hazifanyi uwekezaji mkubwa ili kuendelea na maendeleo ya bidhaa au uzalishaji wake mpaka wawe na maarifa kwamba muundo wa bidhaa unafanya kazi na inaweza kutengenezwa kwa ufanisi ndani ya gharama na matarajio ya ratiba.  <response>: Leading commercial companies do not make significant investments to continue a product development or its production until they have knowledge that the products design works and it can be manufactured efficiently within cost and schedule expectations. 