2.1
30246
2
6
------
5
1.
,
“ ”
Requirement and Specification)
3.
3.1
3.2
3.3
3.4
3.5
2.
4.
5.
6.
7.
8.
9.
10.
11.
12.
50%
2.2
2.3
2.4
Spiral Model)
4.2-4.4
250-400