<prompt> Translate the following text to EnglishMabadiliko katika ukubwa wa mfumo uliokadiriwa yanaweza kuonyesha kwamba mradi huo ulikadiriwa kupita kiasi au kukadiriwa chini katika ukubwa na utata.  <response>: Changes in the estimated system size may indicate that the project was overestimated or underestimated in size and complexity. 