A Study of Lean Construction Practices in Gaza Strip

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4.5.3 Foundation Table (4.20) shows that foundation duration is equal to 192.43 hours. Before applying lean tools, it was 276 hours and the percent of value added time was 16%, the actual duration was 10%, and value added step percent was 50%. It was 15% before applying lean tools. No. 1 2 3 4 Process Form work foundation concrete "A-B-C" and steel. fix neck column "A-B- C" Cast Foundation "A-B- C" Remove form work Total Percentage of value added Table 4.20 Waste elimination in foundation Step number 1 2 3 Step Value added step 0 1 1 4 0 4 2 50% Duration of process (hours) 129.6 15.94 15.55 31.34 192.43 Duration Value added time (hours) 0 15.94 15.55 0 31.49 16% 4.5.4 Neck column Table (4.21) shows that neck column duration is equal to 100.41 hours, before applying lean tools was 132 hours, and the percent of value added time 1.2%, the actual duration was 0.8%, and value added step percent is 33 %, It was 8% before applying lean tools. Table 4.21 Waste elimination in neck column No. Process 1 Form work neck column 2 cast wall concrete "A" 3 Remove form work Total Percentage of value added Step number Step Value added steps 1 0 2 1 3 0 3 1 33 % 60 Duration /hours Duration 79.23 1.26 19.92 100.41 1.2% Value Added time / hours 0 1.26 0 1.26
4.5.5 Isolation Table (4.22) shows that isolation duration is equal to 39.86 hours. Before applying lean tools was 48 hours, and the percent of value added time 100%, the actual duration was 82%, and value added step percent is 100 %. It was 50% before applying lean tools. No. Process 1 Isolation work cleaning Total Percentage of value added Table 4.22 Waste elimination in isolation Step number 1 Steps Value added steps 1 Duration (hours) 39.86 Duration Value added time (days) 39.86 1 1 39.86 39.86 100 % 100 % 4.5.6 Back filling Table (4.23) shows that backfilling duration is equal to 69.93 hours. Before applying lean tools was 112 hours, and the percent of value added time 79.7%, the actual duration was 49%, and value added step percent is 100 %. It was 50% before applying lean tools. No. Table 4.23 Waste elimination for back filling Process 1 Back filling layer1, cleaning site 2 Laboratory 3 Back filling layer 2 4 Laboratory 5 Back filling layer 3 6 Laboratory Total Percentage of value added Step number 1 Step Value added step 1 Duration (hours) 23.47 Duration Value added time (days) 23.47 2 0 7.1 0 3 1 16.46 16.46 4 0 3.57 0 5 1 15.82 15.82 6 0 3.51 0 6 3 69.93 55.75 50% 79.7% 61
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The Islamic University of Gaza Dean
Page 4 and 5:
Acknowledgment I would like to expr
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ABSTRACT This research deals with t
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2.5.6 Increase Output Flexibility .
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Appendices Appendix (A): Daily Repo
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List of Tables Table 2.1: Conceptua
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List of Figures Figure 2.1: Reducti
Page 16 and 17:
1.1 Statement of the Problem Most o
Page 18 and 19:
2.1 Lean Construction History Chapt
Page 20 and 21:
2.3 Impact of Lean Construction Acc
Page 22 and 23:
Table 2.1 Conceptualization of lean
Page 24 and 25: for measuring the percent plan comp
Page 26 and 27: 2.5.6 Increase output flexibility F
Page 28 and 29: � The more wastes inherent in the
Page 30 and 31: 3. System requires the need to deve
Page 32 and 33: the work flow, material flow, produ
Page 34 and 35: • Straighten Next, materials were
Page 36 and 37: Material Productivity = Total Outpu
Page 38 and 39: investigation showed that 25 percen
Page 40 and 41: 7. Poor technology of equipment. 8.
Page 42 and 43: 2. Unnecessary material handling. 3
Page 44 and 45: inventory (Wrong storage of materia
Page 46 and 47: Main Activity Mobilization and exca
Page 48 and 49: 4. Sort the candidates in order of
Page 50 and 51: 4.2 Project Activities Lean constru
Page 52 and 53: Table 4.2 represents the resources,
Page 54 and 55: Main Activity Slab work Building wo
Page 56 and 57: 4.4.1 Mobilization and excavation T
Page 58 and 59: 4.4.4 Neck column Table (4.6) shows
Page 60 and 61: 4.4.7 Ground beam The twelve proces
Page 62 and 63: 4.4.10 Ground floor slab The eleven
Page 64 and 65: No. 9 10 11 Table 4.14 Non-value ad
Page 66 and 67: 4.5 Remove or Reduce the Influence
Page 68 and 69: The result by using arena simulatio
Page 70 and 71: Table 4.17 Simulation results No. A
Page 72 and 73: Table 4.17 Simulation results (Cont
Page 76 and 77: 4.5.7 Ground beam Table (4.24) show
Page 78 and 79: 4.5.11 Column first floor Table (4.
Page 80 and 81: 4.6 Identify the Cause of Waste Tab
Page 82 and 83: Percent of value adding time 35% 30
Page 84 and 85: Table 4.33 Total project duration N
Page 86 and 87: Then, the processes with the greate
Page 88 and 89: number of workers to 12 workers sho
Page 90 and 91: Activity Process Ground floor Colum
Page 92 and 93: Actual project duration was 6000 ho
Page 94 and 95: Date Process Assigned Process Compl
Page 96 and 97: 5.1 Conclusion Chapter Five Conclus
Page 98 and 99: References 1. Abudallah Fawaz , (20
Page 100 and 101: 27. Graham, P. and Smithers, G., (1
Page 102 and 103: 51. Serpell, A.; Venturi, A. and Co
Page 104 and 105: Appendices (A) Daily report Date Ac
Page 106 and 107: 04/09/2003 06/09/2003 07/09/2003 08
Page 108 and 109: 18/12/2003 20/12/2003 21/12/2003 22
Page 110 and 111: 11/04/2004 12/04/2004 13/04/2004 14
Page 112 and 113: Appendix (B) Arena Simulation Compu
Page 114: Appendix (C ) Simulation result of
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A Study of Lean Construction Practices in Gaza Strip

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