-ìèíèìàëüíî äîïóñòèìûé äîõîä ïî âëîæåíèÿì â ýêîíîìè÷åñêèé ïðîåêò; íèæíÿÿ ãðàíèöà, îïðåäåëÿþùàÿ öåëåñîîáðàçíîñòü âëîæåíèÿ ñðåäñòâ â ïðîåêò.