Aug 5, 2016 - ... framework that can support a dynamic work breakdown as a crucial element of the project. ... Onsite Management. QC. Fabrication. Storage.
THE ROLE OF CONCEPTUAL MODELING IN LEAN CONSTRUCTION SIMULATION M. Poshdar, The University of Auckland, New Zealand V. A. González, The University of Auckland, New Zealand M. O’Sullivan, The University of Auckland, New Zealand M. Shahbazpour, The University of Auckland, New Zealand C. G. Walker , The University of Auckland, New Zealand H. Golzarpoor , The University of Auckland, New Zealand
A Shortage in Lean Construction Simulation ■ To implement the pull-driven approach as a lean construction principle, managerial interventions during the project execution are inevitable ■ It may cause a change in the planned sequence of the work process
■ A review of the simulation models used in lean construction research indicates a lack of a systematic framework that can support a dynamic work breakdown as a crucial element of the project.
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A Systematic Structure to Develop Simulation Studies
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A Conceptual Modeling Framework for Lean Construction Simulation
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An Illustrative Case Example ■ A housing construction project
Fabrication Installation
QC
Storage
Storage Offsite Management
Onsite Management
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An Illustrative Case Example ■ Phase 1, Understanding the problem: The planned sequences of work would be affected by unexpected conditions during the implementation phase ■ Phase 2, , Identification of model objectives: General Organizational Aims: (1) Minimizing the inventory, (2) Minimizing project completion time, and (3) Maximizing project productivity The specific objective of this study: To perform an accurate assessment of the likely contributions of undertaking a pull strategy in the project by using a simulation study
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An Illustrative Case Example ■ Phase 3, Defining input factors and output responses: Input: the time required to complete an activity in practice Output: The project KPIs including completion time, inventory size, and achieved productivity
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An Illustrative Case Example ■ Phase 4, Determination of the model contents, scope, and details: The modeling structure: The involved activities and their associated entities
Fabrication Transportation Installation
QC
Storage
Storage Offsite Management
Onsite Management
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An Illustrative Case Example ■ Phase 4, Determination of the model contents, scope, and details: The individual behavior:
Behavioral view of product type 1
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An Illustrative Case Example ■ Phase 4, Determination of the model contents, scope, and details: Modeling the management interventions:
a b Fabrication Transportation
d
c
Installation
QC
f Storage
e Storage Offsite Management
Onsite Management 8/5/2016
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An Illustrative Case Example ■ Phase 5, Presenting the conceptual model: We used a basic outline of the components to enhance the transparency of the elements ■ Phase 6, Validating the conceptual model: We used the opinions of the project execution team
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Last word ■ A systematic structure was discussed for lean construction simulation modeling with three major abstraction phases Conceptual modeling, design, and implementation. ■ Among them, the conceptual modeling phase has received the least attention from the simulation modelers in construction. ■ A conceptual modeling framework was discussed to be used in lean construction context that involves the managerial decisions as an explicit part of the model. ■ The framework enables modeling of the selective control utilized by the pull systems based on real-time information from project.
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