Basic LEAPCON Slides
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Transcript Basic LEAPCON Slides
LEAPCON
Lean Apartment Construction
Workshop
Civil and Environmental Engineering
Technion - Israel Institute of Technology
Assoc. Prof. Rafael Sacks
[email protected]
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
[email protected]
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
6
22
25
24
27
7
26
29
28
31
8
30
32
Quality
Control
Client
Changes
Rep
Client
Assoc. Prof. Rafael Sacks
[email protected]
www.technion.ac.il/~cvsacks
Production
Plan
(Gantt Chart)
Civil and Environmental Engineering
Technion - Israel Institute of Technology
Assoc. Prof. Rafael Sacks
[email protected]
www.technion.ac.il/~cvsacks
Results for 2 groups
Round
Completed
(units)
Defective
Time to first
W.I.P.
apartments apartment with (units)
(units)
changes (min.)
Throughput
(units/min.)
Cash flow
(1)
(2)
(3)
(4)
(2)
(5)
($)
Cycle time
(min.)
Conventional
Lean
Civil and Environmental Engineering
Technion - Israel Institute of Technology
Assoc. Prof. Rafael Sacks
[email protected]
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
[email protected]
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
[email protected]
www.technion.ac.il/~cvsacks
LEAPCON – typical results
Civil and Environmental Engineering
Technion - Israel Institute of Technology
Assoc. Prof. Rafael Sacks
[email protected]
www.technion.ac.il/~cvsacks
22:03
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
[email protected]
www.technion.ac.il/~cvsacks
22:03
10
LEAPCON Users around the world
Civil and Environmental Engineering
Technion - Israel Institute of Technology
Assoc. Prof. Rafael Sacks
[email protected]
www.technion.ac.il/~cvsacks
22:03
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
[email protected]
www.technion.ac.il/~cvsacks