A Study of Lean Construction Practices in Gaza Strip

No.
Table 4.13 Non-value added processes in first floor column
Process
1 Steel work column part A,C
2 Form work column part A,C
Check column before casting
3
for part C
4 Cast column part C
5 Check column part A.
6 Cast column part A
7 Remove form work part A, C
8 Steel work for column part B
9 Form work column part B
10 Check column part B
11 Cast column part B
12 Remove form work part B
Total
Percentage of value added steps (%)
4.4.12 First floor slab
Step
number
1
2
3
4
5
6
7
8
9
10
11
12
12
Step
16%
Value added
steps
1/2
0
0
1/3
0
1/3
0
1/2
0
0
1/3
0
2
Duration/
hours
1day=
8hours
The eleven processes that represent first floor slab are shown in Table (4.14). The
number of value added steps is 4 out of 11 steps (36%) and the total duration in the
daily report is 163 hours.
No.
1
2
3
4
5
6
7
8
Table 4.14 Non-value added processes in first floor slab
Process
Step
number
Step
Value added
steps
Duration
1day=
8hour
Form work for part A,B 1
0
50
Hollow cement block for
part A,B
2 1/2
5
Electric work for part
A,B
3 1/2
4
Mechanical work for part
A,B
4 1/2
6
Cast slab ground floor
part A,B
5
1/2
6
Form work fort part C 6
0
34
Hollow cement bloc for
part C
7
1/2
16
Electric work for part C 8 1/2
4
49
32
88
8
7
12
6
12
14
72
6
6
37
300