<prompt> Translate the following text to SwahiliThe cost models described in appendix II can be used to make a rough estimate of how long a system development may require.  <response>: Mifano ya gharama iliyoelezwa katika nyongeza ya pili inaweza kutumika kufanya makadirio ya karibu ya muda gani maendeleo ya mfumo inaweza kuhitaji. 