A Study of Lean Construction Practices in Gaza Strip

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4.5.11 Column first floor Table (4.28) shows that column first floor duration is equal to 195.75 hours. Before applying lean tools was 346 hours, and the percent of value added time 9%, the actual duration was 4.7%, and value added step percent is 50 %.It was 10 % before applying lean tools. No. Table 4.28 Waste elimination in first floor column Process 1 Steel work 2 Form work column 3 Cast column 4 Remove form work Total Percentage of value added Step number 1 2 3 4 4 Step Value added step Duration (hours) Duration 1 16.56 - 157.51 1 1.27 - 20.41 2 195.75 50% 9% Value added time (hours) 16.56 0 1.27 0 17.83 4.5.12 First floor slab Table (4.29) shows that slab first floor duration is equal to 140.53 hours. Before applying lean tools was 168 hours, and the percent of value added time 50%, the actual duration was 44%, and value added step percent is 67 %. It was 41% before applying lean tools. No. Table 4.29 Waste elimination for first floor slab Process 1 Form work 2 Hollow cement block 3 Steel work 4 Electric, mechanic work 5 Cast concrete 6 Remove form work Total Percentage of value added Step number 1 2 3 4 5 6 6 64 Step Value added step 67% 0 1 1 1 1 0 4 Duration 31.51 20.32 32.23 8.92 8.9 39.37 140.53 Duration Value Added Time (hrs) 0 20.32 32.23 8.92 8.9 0 70.37 50%
4.5.13 Building in ground floor Table (4.30) shows that building ground floor duration is equal to 554.91 hours. Before applying lean tools was 560 hours, and the percent of value added time 88%, the actual duration was 87%, and value added step percent was 55 %. It was 26% before applying lean tools. Table 4.30 Waste elimination for ground floor building Step Duration No. Process Step number Value added step Duration (hours) Value Added Time (hrs) 1 Building work 1 1 173.29 173.29 2 Form work 2 0 19.62 0 3 Cast lintel 3 1 5.87 5.87 4 Remove form work 4 0 11.72 0 5 building work 2 5 1 133.24 133.24 6 Lintel work form work 1 6 - 19.62 0 7 Cast lintel 7 1 5.98 5.98 8 Remove form work 8 - 11.88 0 9 Building work 3 9 1 173.69 173.69 Total 9 5 554.91 492.07 Percentage of value added 55% 88% 4.5.14 Building in first floor Table (4.31) shows that building first floor duration is equal to 553.37 hours. Before applying lean tools was 560 hours, and the percent of value added time 88%, the actual duration was 87%, and value added step percent is 55 %. It was 26% before applying lean tools. Table 4.31 Waste elimination for first floor building Step Duration No. Process Step numb er Value added step Duration (hours) Value Added Time (hrs) 1 Building work 1 1 172.75 172.75 2 Form work 2 0 20.07 0 3 Cast lintel 3 1 5.93 5.93 4 Remove form work 4 0 11.72 0 5 Building work 2 5 1 132.67 132.67 6 Lintel work form work 6 0 20.1 0 7 Cast lintel 7 1 5.99 5.99 8 Remove form work 8 0 11.88 0 9 Building work 3 9 1 172.21 172.21 Total 9 5 553.37 489.55 Percentage of value added 55% 88% 65
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The Islamic University of Gaza Dean
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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
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1.1 Statement of the Problem Most o
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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
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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 74 and 75: 4.5.3 Foundation Table (4.20) shows
Page 76 and 77: 4.5.7 Ground beam Table (4.24) show
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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