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Ebrahimy Y.,CoSyn Technology | AbouRizk S.M.,University of Alberta | Fernando S.,Drainage Services | Mohamed Y.,University of Alberta
Engineering, Construction and Architectural Management | Year: 2011

Purpose - The purpose of this paper is to develop a simulation model capable of capturing the complex variables impacting the productivity of tunneling construction projects. Design/methodology/approach - Simulation modeling is used to construct high-level models of construction supply networks in order to perform quantitative analysis, enabling planners to work out the embedded complexities of the system. Findings - This study presents a detailed simulation model of a real life tunnel construction project along with its supply chain of liner segments. Using this detailed model, a sensitivity analysis for the tunneling project shows the impact of chosen variables on the duration of a tunneling project; these results are used to verify the importance of considering the whole supply chain of a construction project in the planning stage. Practical implications - Effective quality control, consideration of the shortage of storage space, and anticipation of required lead time when placing the first order to achieve the full storage capacity of liners before the start of a project are some practices that can be employed by construction organizations to address supply chain issues for tunneling projects. Originality/value - Research into quantifying the benefits of implementing supply chain management (SCM) is very limited: the literature for the construction industry generally discusses how SCM concepts can be adopted, or what problems and challenges inhibit such adoption without analyzing and quantifying the effects of these techniques on an actual construction project. © Emerald Group Publishing Limited. Source


Shahin A.,CoSyn Technology | Abourizk S.M.,University of Alberta | Mohamed Y.,University of Alberta
Journal of Construction Engineering and Management | Year: 2011

This paper proposes a framework for simulating weather-sensitive construction projects that are executed under extreme weather conditions. It applies the framework steps to enable simulating and planning pipeline construction activities under severe cold weather conditions. The uncertainties caused by weather, such as extreme cold, heat, wind, or precipitation, can significantly affect a project's schedule and produce significant deviations from the baseline schedule. The proposed framework structures a project in the way an engineer would approach it, setting out a breakdown of work activities to quantify weather effects and account for their impact on the project baseline. The proposed weather-sensitive construction simulation framework is employed to determine the effects of weather on the construction process of high-density polyethylene (HDPE) pipe installation. The relevant simulation findings are reported to clarify the impact of extreme weather events on construction projects and to assist in project planning and decision support. © 2011 American Society of Civil Engineers. Source


Shahin A.,CoSyn Technology | Abourizk S.M.,University of Alberta | Mohamed Y.,University of Alberta | Fernando S.,Design and Construction
Canadian Journal of Civil Engineering | Year: 2014

In cold regions, weather introduces a great deal of uncertainty to weather-sensitive construction activities, resulting in project schedules that deviate from plans. To maximize construction process productivity, decisions regarding process execution planning and sequence of work need to be made, based on reliable plans and schedules. Faced with winter weather uncertainty in cold regions, this task becomes quite challenging. This paper follows the framework that was proposed in the literature for simulating weather-sensitive construction projects executed under cold weather conditions. In the literature, the authors applied the framework steps to enable simulating and planning pipeline construction activities under severe cold weather. The proposed framework sets out a work breakdown structure of activities to account for and quantify weather impact on the project schedule. The steps outlined in the framework are followed to enable simulating and planning tunnelling construction activities executed under severe cold weather conditions. Relevant simulation findings, which clarify the impact of cold weather events on construction projects and can assist in project planning and decision support, are reported. Source


Ebrahimy Y.,CoSyn Technology | Abourizk S.M.,University of Alberta | Fernando S.,CoSyn Technology | Mohamed Y.,University of Alberta
Simulation | Year: 2011

The supply chain management (SCM) field of research has developed a valuable set of concepts and strategies to incorporate the core competencies of suppliers into industrial systems, a trend followed by the construction industry. Research into quantifying the benefits of implementing SCM in construction has been very limited; the literature for the construction industry generally discusses how SCM concepts can be adopted, or what problems and challenges inhibit such adoption, without analyzing and quantifying the effects of these techniques on an actual construction project. No analytical approach or special-purpose simulation tool has yet been developed to facilitate such quantitative analysis for construction projects. This paper presents a construction supply chain simulation toolkit that is capable of modeling different supply chain problems and is compatible with other construction simulation tools. A detailed simulation model of the effects of supply chain issues on the productivity of a real-life construction project, constructed using this toolkit, is also presented. © The Author(s) 2011. Source

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