LEAPCON Lean Apartment Construction Workshop Civil and Environmental

LEAPCON Lean Apartment Construction Workshop Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Apartment Construction Flooring Drywall HVAC Ceilings Design Changes Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Simulation setup Material Store Crane 1 3 1 2 5 4 7 HVAC team Ceiling team 2 Building floors and apartments Client Rep 6 9 8 11 3 10 13 12 15 Drywall team 4 14 17 16 19 5 18 21 20 23 Flooring team Project Manager Civil and Environmental Engineering Technion - Israel Institute of Technology Design Changes 22 24 6 25 27 7 26 29 28 31 8 30 32 Quality Control Client Changes Rep Client Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Production Plan (Gantt Chart) Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Results for 2 groups Round Complet Defective Time to first W. I. P. Throughpu Cash flow Cycle time ed (units) apartment (units) t (min. ) ($) s (units) with (units/min. ) changes (min. ) (2) (3) (4) Conventional (1) (2) (5) Lean Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Discussion between rounds: Difficulties with the system § Management Team: § What did you feel during the game? Were you busy? § Did you manage to implement your plan? Were you in control? § Drywall team: § Were you busy? § HVAC team § Were you busy? § Bottleneck, Cycle time, WIP, Push § What is the meaning of cycle time for apartment construction in real projects? § How would you improve the process? Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

Discussion after the second round § Management Team: § What did you feel during the game? Were you busy? § Did you manage to implement your plan? Were you in control? § Drywall team: § Were you busy? Was your productivity improved? § HVAC team § Were you busy? Was your productivity improved? § Bottleneck, Cycle time, WIP, Push § What is the meaning of cycle time for apartment construction in real projects? § How would you improve the process? Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

LEAPCON – typical results Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

16: 10 LEAPCON - Cash Flows $20, 000 F: Lean $15, 000 $10, 000 F': Lean, no customization Cash Flow $5, 000 $0 $(5, 000) A': Conventional, no customization $(10, 000) A: Conventional $(15, 000) $(20, 000) 0. 00 2. 00 4. 00 6. 00 8. 00 10. 00 12. 00 14. 00 16. 00 18. 00 20. 00 22. 00 24. 00 Simulation Time (min. sec) LEAPCON Simulation www. technion. ac. il/~cvsacks/tech-leap. htm 9 Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

16: 10 10 LEAPCON Users around the world Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks

16: 10 Background Reading § § § “The Goal” Eli Goldratt www. leanconstruction. org “Lean Thinking” Womack and Jones www. iglc. net “The Critical Chain” Eli Goldratt “Factory Physics” Hopp and Spearman § Sacks, R. , Esquenazi, A. , and Goldin, M. , (2007). ‘LEAPCON: Simulation of Lean Construction of High-rise Apartment Buildings’, Journal of Construction Engineering and Management, Vol. 133 No. 7 pp. 529 -539. 11 Civil and Environmental Engineering Technion - Israel Institute of Technology Assoc. Prof. Rafael Sacks cvsacks@technion. ac. il www. technion. ac. il/~cvsacks