<prompt> Translate the following text to EnglishKwa mfano, kulinganisha idadi halisi ya kazi zilizochunguzwa kwa mafanikio na idadi iliyopangwa katika ratiba ya ununuzi, inahitaji kwamba upimaji wa mfumo uwe unaendelea.  <response>: A comparison of the actual number of functions successfully tested to the number planned in the acquisition schedule, for example, requires that system testing be underway. 