A Study of Lean Construction Practices in Gaza Strip

No.
9
10
11
Table 4.14 Non-value added processes in first floor slab (cont.)
Process
Mechanical work for part
C
Cast slab for part C
Remove form work for
part A,B,C
Total
4.4.13 Ground floor building
Step
number
9
10
11
11
Step Duration
Value added
steps
36%
1/2
1/2
0
4
1day=
8hour
Table (4.15) shows eighteen processes where the number of value added steps is 5 out
of 18 steps (27%) and the total duration of the ground floor building in the daily report
is 560 hours
Percentage of value added steps
Table 4.15 Non-value added and value added processes in building for ground floor
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Steps
Building work in part A,B for first layer
Lintel form work under the windows
Cast lintel
Remove form work
Building work for part A,B in the second
layer
Lintel form work up the windows
Cast lintel for second layer
Remove form work
Building work up the window
Building work in part C for first layer
Lintel form work under the windows
cast lintel
Remove form work
Building work for part C in the second layer
Lintel form work up the windows
Cast lintel for second layer
Remove form work
Building work up the window
Total
Percentage of value added steps
50
Step
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
18
Step
27%
Value
added
steps
1/2
0
1/2
0
1/2
0
1/2
0
1/2
1/2
0
1/2
0
1/2
0
1/2
0
1/2
5
8
6
24
163
Duration
(hours)
56
24
6
16
72
24
8
8
48
8
48
8
80
56
16
76
24
38
560