A Study of Lean Construction Practices in Gaza Strip

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Table 4.2 represents the resources, the duration for the process and the bill of the quantities of project by using Table (3.1). The following resources are available throughout all the project period: Project manager (1), Site engineer (2), Foreman (1), Surveyor (1). Calculation in the last column was done as follows: Duration (hour) = Quantity/ ( Number of resources x Productivity x 8 hours) Maximum duration of the excavation process = 6000/ (1x 57x 8)= 13 hours. Most likely duration of the excavation process = 6000/ (1x 62x 8)= 12 hours. Minimum duration of the excavation process = 6000/ (1x 68x 8)= 11 hours. The remaining processes were calculated in the same way. Main Activity Mobilizatio n and excavation Plain concrete Foundation Neck column Process Table 4.2 Productivity of the project activities Excavation work Uni t M 3 Form work M 2 Cast plain concrete Remove form work M 2 M2 Form work M 3 Fix neck column Cast foundation Remove form work Form work Cast concrete Remove form work M 3 M 3 M3 M 3 M 3 M3 Quantity 6000 No. resource 1 Excavator Productivity/* hour 57, 62, 68 140 5 workers 0.6, 0.8, 1 140 5 workers 0.7, 0.8, 1 140 5 workers 0.6, 0.7, 0.9 935 9 workers 0.6, 0.9, 1 935 9 workers 6, 8, 10 935 9 workers 6 , 7 , 12 935 9 workers 2, 3, 4 60 8 workers 60 8 workers 0.07, 0.08, 0.15 0.08, 0.1, 0.12 60 8 workers 0.3, 0.4, 0.5 Duration 1day=8h 11,12,13 days 3.5, 4.5. 5.5 days 4,5,6 hours 3, 4, 5 days 11.5, 15, 21 days 1.5,2, 2.5 days 12, 16,18 hours 3, 4, 5 days 51, 90, 103 hours 60, 75, 90 minute 16, 20, 24 hours * This column shows the minimum, most likely and maximum productivities according to the bill quantity of the project. 38
Main Activity Back filling Ground beam Column work Ground floor Table 4.2 Productivity of the project activities(Cont.) Process Unit First layer M 3 Second layer M 3 Final layer Form work Cast concrete Remove form work Fix steel column Form work Cast concrete Remove form work Preparati on work Steel work Mechanic work Cast concrete M 3 M 3 M 3 M 3 M 3 M 3 M 3 M 3 M 2 M 2 M 2 M 2 Quantity 1000 1000 1000 180 180 180 145 145 145 145 2000 2000 2000 2000 39 No. resource 2 excavator s 2 excavator s 2 excavator s 8 workers 8 workers 8 workers 4 workers 4 workers 4 workers 4 workers 5 workers 5 workers 5 workers 5 workers Productivity /hour 18, 21, 22 25, 31, 41 25, 31, 41 0.3, 0.4, 0.6 0.08, 0.1, 0,12 0.7, 0.9, 1 1.8, 2, 3 0.1, 0.2, 0.3 0.4, 0.5, 0.6 1.5, 1.8, 2 33, 36, 40 14, 15, 16 60, 80, 100 60, 80, 100 Duration 1day=8h 2.5, 3,3.5 days 1.5, 2, 2.5 days 1.5, 2, 2.5 days 4.5, 7, 10 days 60, 75,90 hours 2.5, 3, 4 days 1.5, 2, 2.5 days 102, 180, 206 hours 60, 75, 90 minute 16, 20, 24 hours 10, 11, 12 hours 26, 27, 28 hours 4, 5 ,6 hours 4, 5 ,6 hours
Page 1: The Islamic University of Gaza Dean
Page 4 and 5: Acknowledgment I would like to expr
Page 6 and 7: ABSTRACT This research deals with t
Page 8 and 9: 2.5.6 Increase Output Flexibility .
Page 10 and 11: Appendices Appendix (A): Daily Repo
Page 12 and 13: List of Tables Table 2.1: Conceptua
Page 14 and 15: 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 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 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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