1. Lean Apartment Construction Workshop
LEAPCON
Lean Apartment Construction
Workshop

2. Apartment Construction
22 פברואר, 2006
בנייה רזה
Apartment Construction
Drywall
Ceilings
HVAC
Flooring
Design Changes
(c) 2006 Dr. Rafael Sacks, Technion

3. Simulation setup 2 3 4 5 6 7 8 Building floors and apartments
22 פברואר, 2006
בנייה רזה
Simulation setup
Material Store
Building floors and apartments
Crane
Client Rep 1 3 2 4 5 7 6 8 2 9 11 10 12 3 13 15 14 16 4 17 19 18 20 5 21 23 22 24 6 25 27 26 28 7 29 31 30 32 8
HVAC team
Drywall team
Flooring team
Quality Control
Ceiling team
Project Manager
Design Changes
Client Changes Rep
Client
(c) 2006 Dr. Rafael Sacks, Technion

4. Production Plan (Gantt Chart)
22 פברואר, 2006
בנייה רזה
Production Plan (Gantt Chart)
(c) 2006 Dr. Rafael Sacks, Technion

5. Results for 2 groups Round Completed (units)
22 פברואר, 2006
בנייה רזה
Results for 2 groups
Round
Completed (units)
Defective apartments (units)
Time to first apartment with changes (min.)
W.I.P. (units)
Throughput (units/min.)
Cash flow
($)
Cycle time (min.)
Conventional
(1)
(2)
(3)
Lean
(4)
(5)
(c) 2006 Dr. Rafael Sacks, Technion

6. Discussion between rounds: Difficulties with the system
22 פברואר, 2006
בנייה רזה
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
Bottleneck, Cycle time, WIP, Push
What is the meaning of cycle time for apartment construction in real projects?
How would you improve the process?
(c) 2006 Dr. Rafael Sacks, Technion

7. Discussion after the second round
22 פברואר, 2006
Discussion after the second round
בנייה רזה
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
Bottleneck, Cycle time, WIP, Push
What is the meaning of cycle time for apartment construction in real projects?
How would you improve the process?
(c) 2006 Dr. Rafael Sacks, Technion

8. LEAPCON – typical results
22 פברואר, 2006
LEAPCON – typical results
בנייה רזה
(c) 2006 Dr. Rafael Sacks, Technion

9. LEAPCON - Cash Flows LEAPCON Simulation F: Lean
03:38
LEAPCON - Cash Flows
$(20,000)
$(15,000)
$(10,000)
$(5,000) $0
$5,000
$10,000
$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)
Cash
Flow
F': Lean, no customization
F: Lean
A': Conventional, no customization
A: Conventional
LEAPCON Simulation

10. LEAPCON Users around the world
03:38

11. Background Reading “The Goal” Eli Goldratt www.leanconstruction.org
03:38
Background Reading
“The Goal” Eli Goldratt
“Lean Thinking” Womack and Jones
“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