Sheriz Khan - Academia.edu (original) (raw)
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Papers by Sheriz Khan
Several studies have found that traditional design planning to be unreliable and a cause of workf... more Several studies have found that traditional design planning to be unreliable and a cause of workflow variability during design development. The reason given for this is that traditional design planning lacks a mechanism to control workflow. Other studies have shown that the Last Planner system (LPS) of production planning and control reduces workflow variability during the construction stage of building projects by increasing planning reliability through greater collaboration in the planning of construction tasks and better coordination of work between the building trades. It is believed that LPS can also reduce workflow variability during the design stage by increasing planning reliability through greater collaboration in the planning of design tasks and better coordination of work between the design disciplines. In recent years, there has been a move toward collaborative and coordinated working practices in design firms, which has necessitated the formation of architectural/engine...
26th Annual Conference of the International Group for Lean Construction, 2018
The descriptive approaches, like case study, interview, survey, observation and document analysis... more The descriptive approaches, like case study, interview, survey, observation and document analysis, widely used by the lean construction community to investigate managerial problems in the construction industry, typically provide explanations of problems and not solutions to them, leaving a gap between theory and practice. Two prescriptive approaches-design science research and action research-are therefore recommended. Design science research and action research offer alternative approaches for studying, understanding and solving practical problems and testing innovative solutions in design and construction management, for bridging the gap between theory and practice and for making academic research more relevant to practice.They can be used to develop and/or test solutions to managerial problems in the construction industry and generate new knowledge and/or theory.The purpose of this paper is to describe design science research and action research and discuss three cases of lean construction research in which these approaches were used effectively.
There is no convention for evaluating action research (AR), and the one commonly used for evaluat... more There is no convention for evaluating action research (AR), and the one commonly used for evaluating research in general was deemed unsuitable for evaluating a postgraduate AR study on lean design management conducted by the researchers. The purpose of this paper is to present the framework developed by the researchers for evaluating the AR study, using criteria that are different from those traditionally used to evaluate research. It is hoped that this paper will contribute to lean construction research (LC) by highlighting the importance of using AR to measure the efficacy of LC production systems in their intended context of application and by letting future LC researchers know that they can develop their own criteria for evaluating their research rather than use generic criteria that may not be suitable.
Variability in workflow during the design stage of building projects has been widely acknowledged... more Variability in workflow during the design stage of building projects has been widely acknowledged as a problem related to poor planning and control of design tasks and has been identified as a major cause of delay in building projects. The Last Planner system (LPS) of production planning and control helps to create predictable and reliable workflow by enabling the management of the range of relationships, interfaces and deliverables involved in a project. This paper presents results of implementing LPS in design to minimize variability in workflow within BIM-based building design projects. Action research was used to implement and evaluate the effectiveness of LPS weekly work planning (WWP) to improve workflow during the design development phase of two building design projects. The research was carried out with the collaboration between design practitioners at two building design firms in Florida and the researchers as facilitators. Overall PPC (Percent Plan Complete) measurements s...
Building design firms strive to maintain consistency in workflow and protect production from unce... more Building design firms strive to maintain consistency in workflow and protect production from uncertainty during the building design process. However, poor design management often gives rise to variability in workflow during the building design process which causes delays in building projects. As lean approaches, the Last Planner System (LPS) and Building Information Modeling (BIM) can improve workflow in building projects through features that reduce waste and increase efficiency. Since its introduction, BIM has had significant positive effect on workflow in building design projects, but combining LPS with BIM in building design projects has been rarely considered. This paper is part of a postgraduate research in which LPS weekly work plans (WWPs) were implemented in two BIMbased building design projects to see if better workflow could be achieved. It reports on the interactions in the two building design projects between the two lean principles of LPS and the seven BIM functionalities that, from the perspective of Sacks et al. (2010a), have the greatest impact on workflow when they interact positively. The findings suggest that the interactions improved workflow.
Several studies have found that traditional design planning to be unreliable and a cause of workf... more Several studies have found that traditional design planning to be unreliable and a cause of workflow variability during design development. The reason given for this is that traditional design planning lacks a mechanism to control workflow. Other studies have shown that the Last Planner system (LPS) of production planning and control reduces workflow variability during the construction stage of building projects by increasing planning reliability through greater collaboration in the planning of construction tasks and better coordination of work between the building trades. It is believed that LPS can also reduce workflow variability during the design stage by increasing planning reliability through greater collaboration in the planning of design tasks and better coordination of work between the design disciplines. In recent years, there has been a move toward collaborative and coordinated working practices in design firms, which has necessitated the formation of architectural/engine...
26th Annual Conference of the International Group for Lean Construction, 2018
The descriptive approaches, like case study, interview, survey, observation and document analysis... more The descriptive approaches, like case study, interview, survey, observation and document analysis, widely used by the lean construction community to investigate managerial problems in the construction industry, typically provide explanations of problems and not solutions to them, leaving a gap between theory and practice. Two prescriptive approaches-design science research and action research-are therefore recommended. Design science research and action research offer alternative approaches for studying, understanding and solving practical problems and testing innovative solutions in design and construction management, for bridging the gap between theory and practice and for making academic research more relevant to practice.They can be used to develop and/or test solutions to managerial problems in the construction industry and generate new knowledge and/or theory.The purpose of this paper is to describe design science research and action research and discuss three cases of lean construction research in which these approaches were used effectively.
There is no convention for evaluating action research (AR), and the one commonly used for evaluat... more There is no convention for evaluating action research (AR), and the one commonly used for evaluating research in general was deemed unsuitable for evaluating a postgraduate AR study on lean design management conducted by the researchers. The purpose of this paper is to present the framework developed by the researchers for evaluating the AR study, using criteria that are different from those traditionally used to evaluate research. It is hoped that this paper will contribute to lean construction research (LC) by highlighting the importance of using AR to measure the efficacy of LC production systems in their intended context of application and by letting future LC researchers know that they can develop their own criteria for evaluating their research rather than use generic criteria that may not be suitable.
Variability in workflow during the design stage of building projects has been widely acknowledged... more Variability in workflow during the design stage of building projects has been widely acknowledged as a problem related to poor planning and control of design tasks and has been identified as a major cause of delay in building projects. The Last Planner system (LPS) of production planning and control helps to create predictable and reliable workflow by enabling the management of the range of relationships, interfaces and deliverables involved in a project. This paper presents results of implementing LPS in design to minimize variability in workflow within BIM-based building design projects. Action research was used to implement and evaluate the effectiveness of LPS weekly work planning (WWP) to improve workflow during the design development phase of two building design projects. The research was carried out with the collaboration between design practitioners at two building design firms in Florida and the researchers as facilitators. Overall PPC (Percent Plan Complete) measurements s...
Building design firms strive to maintain consistency in workflow and protect production from unce... more Building design firms strive to maintain consistency in workflow and protect production from uncertainty during the building design process. However, poor design management often gives rise to variability in workflow during the building design process which causes delays in building projects. As lean approaches, the Last Planner System (LPS) and Building Information Modeling (BIM) can improve workflow in building projects through features that reduce waste and increase efficiency. Since its introduction, BIM has had significant positive effect on workflow in building design projects, but combining LPS with BIM in building design projects has been rarely considered. This paper is part of a postgraduate research in which LPS weekly work plans (WWPs) were implemented in two BIMbased building design projects to see if better workflow could be achieved. It reports on the interactions in the two building design projects between the two lean principles of LPS and the seven BIM functionalities that, from the perspective of Sacks et al. (2010a), have the greatest impact on workflow when they interact positively. The findings suggest that the interactions improved workflow.