A Study of Lean Construction Practices in Gaza Strip

4.4.5 Isolation
Table (4.7) shows two processes that constitute the isolation. The number of value
added steps is 1 out of 2 steps (50 %) and the total duration in the daily report is 48
hours.
No.
1
Table 4.7 Non-value added and value added processes in isolation processes
Cleaning
Process
2 Cleaning , isolation work
Total
Percentage of value added steps
4.4.6 Back filling
Step
number
1
2
2
Steps
50%
Value
added
steps
0
1
1
Duration (hours)
1day=8hours
The six processes that represent backfilling are shown in Table (4.8). The number of
value added steps is three out of six steps (50%) and the total duration in the daily report
is 112 hours.
Table 4.8 Non-value added and value added processes in back filling
No.
1
2
3
Process
Back filling layer1 + cleaning
Laboratory
Back filling layer 2
4 Laboratory
5 Back filling layer 3
6 Laboratory
Total
Percentage of value added steps
Step
number
45
1
2
3
4
5
6
6
Step
50%
Value
added
steps
1
0
1
0
1
0
3
8
40
48
Duration
1day=8hours
Duration
Of process/
hours
48
8
32
4
16
4
112