<prompt> Translate the following text to EnglishKwa mfano, kuendeleza mfano wa gharama kwa ajili ya 20 viwanda nafasi ingekuwa kuhusisha kukusanya data juu ya vipengele vingi vya gharama ya mtu binafsi kutoka kila na kutumia uchambuzi regression kukadiria coefficients ya kazi gharama.  <response>: Ideally, developing a cost model for the 20 plus industrial posts would involve collecting data on many individual cost elements from each and using regression analysis to estimate the coefficients of a cost function. 