On 31 October 2017, the joint research group of the University of Auckland and the Auckland University of Technology (SimCon) held a 2-hour workshop to share new insight into the impacts and benefits of using simulation in the built environment engineering. The learning objectives were as follows: - The use of simulation to lift productivity and competitiveness within the construction industry - The use of simulation for project planning, control and diagnosis - The cutting-edge research being developed by SimCon research group These are slides from the fourth presentation of the workshop. It is focused on explaining some of the case studies conducted in SimCon research group.

1. SimCon: Case Studies
Dr Michael O’Sullivan, BSc (Hons.), MPhil (Disc.), MS, PhD
Senior Lecturer, Department of Engineering Science
Co-Director, Operations Research Union Analytics

2. Earthmoving: Causeway
Project

3. 3
Causeway Project

4. 3 Earthmoving Operations
4
Outputs
Operation
Time
(h)
Cost
($)
Fuel
Cons.
(l)
CO2
Emission
(kg CO2 eq.)
1 294.51 72304.28 15295.28 41297.27
2 358.95 37787.15 8588.53 23189.03
3 239.47 36414.01 6914.48 18669.10
Combined
358.95
(Max)
146505.44
(Total)
30798.29
(Total)
83155.40
(Total)
Evaluating Key Performance Measures

5. 3 Earthmoving Operations
5
Outputs
Model
Time
(h)
Cost
($)
Fuel Cons.
(l)
CO2 Emission
(kg CO2 eq.)
Segregated 358.95 146505.44 30798.29 83155.40
Integrated 302.37 117613.81 24802.32 66966.28
Saving/
Waste
56.58 (-) 28891.63 (-) 5995.97 (-) 16189.12 (-)
Segregated vs Integrated Operations

6. Excavating: Central Rail Link

7. 7
Central Rail Link

8. Travel Times
8
Inputs
From Google Directions API
0
200
400
600
800
1000
1200
1400
1600
AverageTravelTime[s]
Victoria Street to Dumping Site
0
500
1000
1500
2000
2500
3000
3500
AverageTravelTime[s]
Victoria Street to Supplier
0
500
1000
1500
2000
2500
3000
3500
AverageTravelTime[s]
Supplier to Victoria Street
0
500
1000
1500
2000
AverageTravelTime[s]
Dumping Site to Victoria Street

9. Truck Trips
9
Inputs
3 scenarios
1. Order pipe and dump truck trips at 5pm for the next day
2. Order pipe and dump truck trips for the current day at 7am
3. Order pipe and dump truck trips just-in-time (JIT)
a) Order pipe truck trip when a pipe has been used
b) Order dump truck trip when 7m2 soil is in muck pit
• Idealised scenario as baseline
Icons made by Freepik from www.flaticon.com

10. Different Truck Strategies
10
Outputs
Muck Pit Level
0
10
20
30
40
50
60
70
80
90
1 2 1 2 1 2 1 2
1 2 3 4
Max.MuckPitLevel[m³]
capacity=100
# PipeTrucks
# Dumptrucks
Decision at 5:00 pm
Decision at 7:00 am
"Just in Time"

11. Different Truck Strategies
11
Outputs
Average Waiting Time for Trucks
0.35
0.31
0
5
10
15
20
25
30
35
40
1 2 1 2 1 2 1 2
1 2 3 4
AverageTotalWaitingTime[h]
# PipeTrucks
# Dumptrucks
Decision at 7:00 am
Decision at 5:00 pm
"Just in Time"

12. Thanks!!