Table 7: TF and FF calculation in PERT.
|
Activity (i, j) |
Duration |
te (mean) |
Var |
Earliest |
Latest |
FF |
TF |
Remark |
||||
|
A |
m |
B |
|
Start |
Completion |
Start |
Completion |
|
|
|
||
|
A(1,2) |
3 |
5 |
7 |
5 |
0.44 |
0 |
5 |
0 |
5 |
0 |
0 |
Critical |
|
B(2,3) |
4 |
7 |
10 |
7 |
1.0 |
5 |
12 |
5 |
12 |
0 |
0 |
Critical |
|
C(3,4) |
10 |
12 |
14 |
12 |
0.44 |
12 |
24 |
12 |
24 |
0 |
0 |
Critical |
|
D(4,6) |
13 |
14 |
15 |
14 |
0.11 |
24 |
38 |
24 |
38 |
0 |
0 |
Critical |
|
E(4,5) |
15 |
8 |
11 |
8 |
1.0 |
24 |
32 |
47 |
55 |
0 |
23 |
- |
|
F(5,8) |
12 |
14 |
15 |
14 |
0.44 |
32 |
46 |
55 |
69 |
0 |
23 |
- |
|
G(6,7) |
8 |
12 |
16 |
12 |
1.78 |
38 |
50 |
38 |
50 |
0 |
0 |
Critical |
|
H(7,9) |
12 |
19 |
20 |
18 |
1.78 |
50 |
69 |
50 |
69 |
0 |
0 |
Critical |
|
I(9,10) |
14 |
22 |
24 |
21 |
2.79 |
69 |
91 |
69 |
91 |
0 |
0 |
Critical |
|
J(9,11) |
24 |
27 |
30 |
27 |
1.0 |
69 |
91 |
84 |
111 |
15 |
15 |
- |
|
K(10,11) |
16 |
20 |
30 |
21 |
2.5 |
91 |
111 |
91 |
111 |
0 |
0 |
Critical |
|
L(8,12) |
16 |
17 |
24 |
18 |
1.78 |
46 |
63 |
114 |
131 |
0 |
68 |
-l |
|
M(11,13) |
30 |
32 |
34 |
32 |
0.44 |
111 |
143 |
111 |
143 |
0 |
0 |
Critical |
|
N(1,132) |
10 |
12 |
14 |
12 |
0.44 |
63 |
75 |
1.0 |
143 |
68 |
68 |
- |
|
O(13,14) |
6 |
8 |
10 |
8 |
0.44 |
143 |
151 |
143 |
151 |
0 |
0 |
Critical |