Sheikh Irfan QSO600 Milestone 2 2 CASE 
Module 2
2-2 Case Study: Helping the Moores
Moore Housing Contractors
QSO600: Operations Management
Irfan Sheikh
Moore Housing Contractors
CPM/PERT network for Moore House Contractors
Activity
Activity
Activity
Duration
Variance
ES
LS
EF
LF
Slack
a
4.167
.25
0
0.000
4.167
4.167
C r i t i c a l b 3.167
.25
4.167
4.167
7.333
7.333
C r i t i c a l c 3.833
.25
7.333
7.833
11.167
11.667
.500 d 2.167
.25
7.333
33.833
36
36
26.5 e 2
.111
7.333
7.333
9.333
9.333
C r i t i c a l
Dumck
0
0
11.167
12.5
11.167
12.5
1.333 f 3.833
.25
11.167
11.167
15
15.5
.500 g 3.167
.25
9.333
9.333
12.5
12.5
C r i t i c a l h 4.167
.694
9.333
13.5
13.5
17.667
4.167 i 2.833
.25
15
21
17.833
23.833
6 j 2.167
.25
15
15.5
17.167
17.667
.500 k 5.167
.694
.694
12.5
17.667
17.667
C r i t i c a l l 6.5
.694
17.833
23.833
24.333
30.333
6 m 8.333
1
17.667
17.667
26
26
C r i t i c a l n 3.333
.444
24.333
30.333
27.667
33.667
6 o 2.333
.444
27.667
33.667
30
36
6 p 3.5
.694
30
36
33.5
39.5
6 q 4.167
.25
26
26
30.167
30.167
C r i t i c a l r 6.333
1
33.5
39.5
39.833
45.833
6 s 5.833
2.25
30.167
35
36
40.833
4.833 t 4.333
1
30.167
30.167
34.5
34.5
C r i t i c a l u 3.333
.444
30.167
31.167
33.5
34.5
1
Dumuv
0
0
33.5
34.5
33.5
34.5
1 v 6.333
1
34.5
34.5
40.833
40.833
C r i t i c a l w 5
1
40.833
40.833
45.833
45.833
C r i t i c a l
Dumvw
0
0
40.833
40.833
40.833
40.833
C r i t i c a l x 2.833
.25
40.833
43
43.667
45.833
2.167
Critical Path for Moore Contractors
Critical path: a ==> b ==> e ==> g ==> k ==> m ==> q ==> t ==> v ==> dumvw = => w . Variance on the path = 5.805555
Expected completion time is 45.83 days. The expected completion is very close to the realtor’s due date for project completion. Required probability analysis will also be performed that the project will be completed, as follows as per the probability analysis
Moore Contractors Probability Analysis
Assuming that all activities and paths are independent following is the probability calculation. In addition
2-2 Case Study: Helping the Moores
Moore Housing Contractors
QSO600: Operations Management
Irfan Sheikh
Moore Housing Contractors
CPM/PERT network for Moore House Contractors
Activity
Activity
Activity
Duration
Variance
ES
LS
EF
LF
Slack
a
4.167
.25
0
0.000
4.167
4.167
C r i t i c a l b 3.167
.25
4.167
4.167
7.333
7.333
C r i t i c a l c 3.833
.25
7.333
7.833
11.167
11.667
.500 d 2.167
.25
7.333
33.833
36
36
26.5 e 2
.111
7.333
7.333
9.333
9.333
C r i t i c a l
Dumck
0
0
11.167
12.5
11.167
12.5
1.333 f 3.833
.25
11.167
11.167
15
15.5
.500 g 3.167
.25
9.333
9.333
12.5
12.5
C r i t i c a l h 4.167
.694
9.333
13.5
13.5
17.667
4.167 i 2.833
.25
15
21
17.833
23.833
6 j 2.167
.25
15
15.5
17.167
17.667
.500 k 5.167
.694
.694
12.5
17.667
17.667
C r i t i c a l l 6.5
.694
17.833
23.833
24.333
30.333
6 m 8.333
1
17.667
17.667
26
26
C r i t i c a l n 3.333
.444
24.333
30.333
27.667
33.667
6 o 2.333
.444
27.667
33.667
30
36
6 p 3.5
.694
30
36
33.5
39.5
6 q 4.167
.25
26
26
30.167
30.167
C r i t i c a l r 6.333
1
33.5
39.5
39.833
45.833
6 s 5.833
2.25
30.167
35
36
40.833
4.833 t 4.333
1
30.167
30.167
34.5
34.5
C r i t i c a l u 3.333
.444
30.167
31.167
33.5
34.5
1
Dumuv
0
0
33.5
34.5
33.5
34.5
1 v 6.333
1
34.5
34.5
40.833
40.833
C r i t i c a l w 5
1
40.833
40.833
45.833
45.833
C r i t i c a l
Dumvw
0
0
40.833
40.833
40.833
40.833
C r i t i c a l x 2.833
.25
40.833
43
43.667
45.833
2.167
Critical Path for Moore Contractors
Critical path: a ==> b ==> e ==> g ==> k ==> m ==> q ==> t ==> v ==> dumvw = => w . Variance on the path = 5.805555
Expected completion time is 45.83 days. The expected completion is very close to the realtor’s due date for project completion. Required probability analysis will also be performed that the project will be completed, as follows as per the probability analysis
Moore Contractors Probability Analysis
Assuming that all activities and paths are independent following is the probability calculation. In addition