<prompt> Translate the following text to EnglishMabadiliko haya yalilenga hasa 1 kuhakikisha teknolojia zinaonyeshwa kwa kiwango cha juu cha ukomavu kabla ya kuanza programu ya mfumo wa silaha na 2 kuchukua mbinu ya maendeleo au hatua kwa hatua ya kuendeleza mifumo mpya ya silaha.  <response>: These changes focused primarily on 1 ensuring technologies are demonstrated to a high level of maturity before beginning a weapon system program and 2 taking an evolutionary, or phased, approach to developing new weapon systems. 