Line of Balance Schedule for Construction Project
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University of Mustansiriyah 2019-2020
College of Engineering 3
rd
Stage
High. & Trans Eng. Dep.
1
Example 3
Prepare a line of balance schedule for a contract of 15 houses based on a rate of build of three houses per
week assuming five 8-hours day per week. A minimum buffer time of five days should be assumed. The
following table shows the operation together with the estimated man hours and optimum number of men
for each operation. When will the house no. 8 completed? And how many houses completed after 90 days.
2
Line of Balance
3
Line of Balance
4
Line of Balance
5
Line of Balance
6
Line of Balance
7
Line of Balance
8
Line of Balance
U=3(g/G)
9
Line of Balance
U=3(g/G)
10
Line of Balance
U=3(g/G)
T =(M/8Q)
11
Line of Balance
U=3(g/G)
T =(M/8Q)
12
Line of Balance
U=3(g/G)
T =(M/8Q)
S = (14*5)/U=60/U
13
Line of Balance
U=3(g/G)
T =(M/8Q)
S = (14*5)/U=60/U
14
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
33
4+min. buffer
time=4+5=9
A
15
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
16
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
&
G
71
78
100
H
83
107
17
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
&
G
71
78
100
H
83
107
85
109
I
Finish time=109
18
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
&
G
71
78
100
H
83
107
85
109
I
The completion time of unit no.8?
8
1
15
15-1
109-85
8-1
X-85
X
19
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
&
G
71
78
100
H
83
107
85
109
I
The time of
completion unit no.8?
8
1
15
20
Line of Balance
No. of
units
Time, days
Time, days
0
4
0+27=
27
27+4=
31
12
31+min. buffer
time=31+5=36
A
22
46
B
51
29
C
58
36
41
68
45
72
D
50
85
53
88
E
93
69
98
74
F
&
G
71
78
100
H
83
107
85
109
I
90
The number of units completed after 90 days?
15
1
15-1
109-85
y
y-1
Prepare a line of balance schedule for a construction project consisting of 15 houses, with a build rate of three houses per week and a minimum buffer time of five days. The schedule includes various construction activities with estimated man-hours and optimal manpower requirements for each operation. The timeline for completing house number 8 and the total number of houses completed after 90 days are calculated based on the provided information.
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Presentation Transcript
1 University of College of Engineering 3 High. & Trans Eng. Dep. University of Mustansiriyah College of Engineering 3rd High. & Trans Eng. Dep. Mustansiriyah 2019 2019- -2020 rdStage 2020 Stage
2 Line of Balance Example 3 Prepare a line of balance schedule for a contract of 15 houses based on a rate of build of three houses per week assuming five 8-hours day per week. A minimum buffer time of five days should be assumed. The following table shows the operation together with the estimated man hours and optimum number of men for each operation. When will the house no. 8 completed? And how many houses completed after 90 days. Activities Operation Man hours Q A Substructure 180 6 B Brick work 320 4 F C Joiner. 1st fix 200 4 A B C D E G I D Tilers 60 2 E Glazing 40 2 H F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
3 Line of Balance Man hours Activities Operation Q A Substructure 180 6 B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
4 Line of Balance Man hours G=3 ? 5 8=3? G Activities Operation Q 40 A Substructure 180 6 B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
5 Line of Balance Man hours G=3 ? 5 8=3? G Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 A Substructure 180 6 B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
6 Line of Balance Man hours G=3 ? 5 8=3? G g Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 A Substructure 180 6 B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
7 Line of Balance Man hours G=3 ? 5 8=3? G g Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 A Substructure 180 6 B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
8 Line of Balance Man hours G=3 ? 5 8=3? G g U Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
9 Line of Balance Man hours G=3 ? 5 8=3? G g U Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 2.67 3 3.2 2.67 2 3 3 3.2 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
10 Line of Balance Man hours G=3 ? 5 8=3? G g U T Activities Operation Q 40 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 2.67 3 3.2 2.67 2 3 3 3.2 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 T =(M/8Q) C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
11 Line of Balance Man hours G=3 ? 5 8=3? G g U T Activities Operation Q 40 3.75 4 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 2.67 3 3.2 2.67 2 3 3 3.2 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 T =(M/8Q) C Joiner. 1st fix 200 4 D Tilers 60 2 E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
12 Line of Balance Man hours G=3 ? 5 8=3? G g U T S Activities Operation Q 40 3.75 4 10 6.25 7 3.75 4 2.5 3 5 5 6.25 7 1.67 2 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 2.67 3 3.2 2.67 2 3 3 3.2 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 T =(M/8Q) C Joiner. 1st fix 200 4 D Tilers 60 2 S = (14*5)/U=60/U E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
13 Line of Balance Man hours G=3 ? 5 8=3? G g U T S Activities Operation Q 40 3.75 4 10 6.25 7 3.75 4 2.5 3 5 5 6.25 7 1.67 2 26.22 27 23.33 24 21.88 22 26.22 27 35 23.33=24 23.33=24 21.88=22 23.33=24 13.5 24 15 4.5 3 9 6 7.5 3 12 24 16 4 2 9 6 8 3 2.67 3 3.2 2.67 2 3 3 3.2 3 A Substructure 180 6 U=3(g/G) B Brick work 320 4 T =(M/8Q) C Joiner. 1st fix 200 4 D Tilers 60 2 S = (14*5)/U=60/U E Glazing 40 2 F Joiner, 2nd fix 120 3 G Electrician 80 2 H Plumber 100 2 I Painter 40 3
14 Line of Balance 0+27= 27 27+4= 3133 No. of units Time, days 4+min. buffer time=4+5=9 0 4 Time, days
15 Line of Balance 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units Time, days 68 72 85 88 93 98 46 51 58 F A B C D E G I H 29 0 4 12 22 36 41 50 53 69 74 45 Time, days
16 Line of Balance 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units Time, days 68 72 85 88 93 98 100 107 46 51 58 29 83 0 4 12 22 36 41 50 53 69 74 45 Time, days 71 78
17 Line of Balance 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units Time, days 109 68 72 85 88 93 98 100 107 46 51 58 Finish time=109 29 83 0 4 12 22 85 36 41 50 53 69 74 45 Time, days 71 78
18 Line of Balance The completion time of unit no.8? 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units 15 Time, days 109 68 72 85 88 93 98 100 107 46 51 58 7 14 24= ? 85 ? = ?? 15-1 8 8-1 X-85X 1 29 83 0 4 12 22 85 36 41 50 53 69 74 45 109-85 Time, days 71 78
19 Line of Balance 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units 15 Time, days 109 68 72 85 88 93 98 100 107 46 51 58 7 14 24= ? 85 ? = ?? 8 The time of completion unit no.8? 1 29 83 0 4 12 22 85 36 41 50 53 69 74 45 Time, days ?? 71 78
20 Line of Balance The number of units completed after 90 days? 31+min. buffer time=31+5=36 0+27= 27 27+4= 31 No. of units 15 Time, days 109 68 72 85 88 93 98 100 107 46 51 58 14 24= ? =3.91 ? 1 90 85 No. of Completed houses is 3 15-1 y y-1 1 29 83 0 4 12 22 90 85 36 41 50 53 69 74 45 Time, days 109-85 71 78
