? . 1.3 1000 .
20%. 4-7% . " + " , , , .
-
. 1.3.
. , 12% . " + "? 10 2 , 15%. , .
, " + " . , " + " , , , , , - .
" + "
:
5% ?
, 50-80% ?
, 20%?
/ , 50-80%?
?
" + " , " + " . , . 1.1 , .
1.1. " + "
, " + " - . , . ROI 10% 33%.
. 1.2 (. 1.3).
, , , General lectri, .
, , ( 3). , . 1.2, . . , , , .
1.2. " + "
- (RI). " + " - . "" , ROI . , 340 ( ins & mn). , ( ), ( % - RI % - W), , , , . 1.4.
, c RI
. 1.4. R I, : " "
, RI, , - ( RI). - .
RI : (NPV-net present value). , NPV , , . NPV : ( , ) . ( ). , , . NPV. . , .
