From: An evaluation and selection problems of OSS-LMS packages
A i C j
C 1
C 2
C 3
C 4
C 5
C 6
A1
2
1500
20,000
5.5
5
9
A2
2.5
2700
18,000
6.5
3
A3
1.8
2000
21,000
4.5
7
A4
2.2
1800