Acct. Optimistic Likely Activity Variance
ID Description Predecessor Mosta a Pessimistic Time (te) [(b - a)/6]2 Critical 7
(a) (m) (b)
1 Design package None 6 12 24 13 9 x
2 Design product 1 18 19 28 20.33 2.78 x
3 Build package 1 4 7 10 7 1
4 Secure patent 2 21 30 39 30 9 x
5 Build product 2 17 29 47 30 25 x
6 Paint 3,4,5 4 7 12 7.3 1.78 x
7 Test market 6 13 18 19 16 1 x
(m) (b) Time (te) 1 Design package
The Variance for the activity Secure patent equals to:_____.