 design evalu inform system the co-join design evalu call chapter pose organiz inclus-exclus problem author in design evalu prescrib separ set activ pertain plan develop test system structur modif exist structur apprais assess oper system system compon howev design includ formul goal object system provis evalu expect evalu appli test design concept preliminari implement purpos improv initi design well apprais oper system apprais stage system oper yield data indic system modif requir redesign assess thu portion design evalu close interrel katter demonstr 1969 review design evalu examin methodolog respect outcom applic methodolog increasingli design evalu acknowledg depend outcom sound procedur conceptu the current literatur disclos process design evalu well product 