<prompt> Translate the following text to EnglishHizi ni 1 dhana ya ubora ambayo hutumia udhibiti wa mchakato wa takwimu kuleta michakato muhimu ya utengenezaji chini ya udhibiti ili waweze kurudia, kudumu, na kwa uthabiti kutengeneza sehemu ndani ya uvumilivu wa ubora na viwango vya bidhaa, na 2 vipimo vya bidhaa katika hali za uendeshaji ambazo zinahakikisha mfumo utatimiza malengo ya kuegemea - uwezo wa kufanya kazi bila kushindwa au mahitaji ya matengenezo kwa vipindi vinavyotabiriwa.  <response>: These tools are 1 a quality concept that uses statistical process control to bring critical manufacturing processes under control so they are repeatable, sustainable, and consistently producing parts within the quality tolerances and standards of the product and 2 product tests in operational conditions that ensure the system would meet reliability goals-the ability to work without failure or need of maintenance for predictable intervals. 