arrow diagramming method (adm) (activity on arrows...
TRANSCRIPT
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Arrow Diagramming Method (ADM)(Activity On Arrows (AOA) Method)
Construction Project Management
2013. 4.9.Hyoungkwan Kim, PhD, PEng
Yonsei University
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Terminologies
• Early Start (ES) • Late Start (LS)• Early Finish (EF)• Late Finish (LF) • Event• Early Event Time (EET)• Late Event Time (LET)
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AOA Notation
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Predecessor and Successor
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Merge and Burst
F (4)70
D (5)50
E (3)60
G (5)80
10
A (5)10
B (3)20 40
C (7)30
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Cross
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Dummy Activities
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Need for Dummy Activities
X O
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ES, EF, and EET example
3 6
6
6 10
10
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A (4)70
3
D (5)110
B (5)80 100
2
C (6)90
2
ES, EF, and EET example
3 7
2 7
2 8
8
8 13
13
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LS, LF, LET, TF, and FF example
106663300
00
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LS, LF, LET, TF, and FF example
1510
159
1410
99500
10
00
10
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ADM Computation Example
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PDM vs. ADM
• PDM(AON)– Four types of dependencies– No dummy activities– Widely used today– The length of arrow does not mean the duration
• ADM(AON)– Finish to start relationship only– Dummy activities– Widely used in the past– The length of arrow can mean the duration
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History of CPM• 1956: E.I. du Pont de Nemours company started R&D group – New Mgmt. Techniques
• 1957: Kelly Walker Method (Basic CPM) – UNIVAC Application Research Center
• 1958: Great success was achieved in a test case• 1959: CPM was presented to the public• 1960 ~ 65: CPM caption replaced Kelley Walker (Main Chain Technique)
• 1965 ~ 70: CPM was recast into PDM• 1970 ~ 80: This decade saw the evolution of CM and increase in construction litigation citing delay as a cause of damages
• 1980 ~ 89: CPM software development for PC systems
Source: Popescu and Charoenngam 1994
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Advantages and Limitations of CPM Advantages• Improvement in
– communication – scope definition– work assignment– documentation– Time‐cost‐resource correlation
Limitations• Difficult to develop• Difficult to update• Difficult to visualize the process
Many contractors use CPM just for contractual reasons
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Building Information Modeling (BIM) / 4D Visualization
Jung Jun Park, Byungil Kim, Changyoon Kim, and Hyoungkwan Kim (2011). "3D/4D CAD Applicability for Life Cycle Facility Management" Journal of Compu ng in Civil Engineering, 25(2), 129―138.
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BIM / 4D Visualization
Changyoon Kim, Hyoungkwan Kim, Taekwun Park, and Moon Kyum Kim (2011). "Applicability of 4D CAD in Civil Engineering Construction: Case Study of a Cable‐Stayed Bridge Project" Journal of Compu ng in Civil Engineering, 25(1), 98―107.
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Process Simulation Combined with BIM
Mohamed Al‐Hussein, Muhammad Athar Niaz, Haitao Yu, and Hyoungkwan Kim (2006). "Integrating 3D Visualization and Simula on for Tower Crane Opera ons on Construc on Sites" Automa on in Construc on, 15(5), 554―562.
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Automated Site Monitoring
Changyoon Kim, Hyoungkwan Kim, Jeoungpil Ryu, and Changwan Kim (2011). "Ubiquitous Sensor Network for Construction Material Monitoring" Journal of Construc on Engineering and Management, 137(2), 158―165.