Ideally, project documentation should be complete and there would be no need for subcontractors t... more Ideally, project documentation should be complete and there would be no need for subcontractors to seek further information from that which has already been provided. In practice, this is rarely the case. The use of "Request For Information" (RFI) as a formalised process, by which information is gathered or clarified is very common throughout the Australian construction industry. This paper focuses on the use of simulation-based modelling to quantify the time and cost associated with this process as currently communicated between construction organisations. Information gathered from construction projects plus expert advice sought from industry professionals is incorporated as model input. The model shows that the mean cycle time for a typical RFI can be as high as 17 person-hours with most of that time being spent on gathering and cross-referencing information. The simulation model was then modified to explore the potential of implementing Electronic Data Management Technologies as a tool to significantly reduce the time and cost associated with the traditional paper-based RFI process.
Kajewski, Stephen and Mohamed, Sherif and Tilley, Paul and Crawford, John and Chen, Swee-Eng and ... more Kajewski, Stephen and Mohamed, Sherif and Tilley, Paul and Crawford, John and Chen, Swee-Eng and Lenard, Dennis and Brewer, Graham and Gameson, Rod and Martins, Rui and Sher, Willy and Kolomy, Richard and Weippert, Achim and Caldwell, Geoff and Haug, ...
The Cooperative Research Centre for Construction Innovation (CRCCI) research project 2001-008-C:&... more The Cooperative Research Centre for Construction Innovation (CRCCI) research project 2001-008-C:'Project Team Integration: Communication, Coordination and Decision Support', is supported by a number of Australian industry, government and university ...
In an ideal world, the design and documentation provided for construction projects would be compl... more In an ideal world, the design and documentation provided for construction projects would be complete, precise and unambiguous. Unfortunately, this is rarely the case and quite often contractors are supplied with project documentation that is incomplete, conflicting or erroneous, ...
Construction managers have for a long time focused their attention on conversion processes, with ... more Construction managers have for a long time focused their attention on conversion processes, with little attention given to flow activities, leading to uncertain flow processes, expansion of non value-adding activities, and reduction of output value. This paper investigates the incidence of non value-adding activities in construction projects in Indonesia and Australia, focusing on non-residential building and infrastructure projects. Data was collected via questionnaires and personal interviews targeting 99 respondents from Indonesia and 50 respondents from Australia. A quantitative approach was adopted for this research utilising the results of a questionnaire survey involving 53 variables that relate to non value-adding activities. The variables were then separated into two classifications: waste categories that contribute to a reduction in the value of construction productivity and waste cause variables that could be defined as factors producing waste. Statistical analysis was performed to identify the different perceptions amongst the respondents and to determine the key variables of non value-adding activities. The paper illustrates the key waste categories, the key waste cause variables and leads the contractors to focus their attentions on these issues in order to reduce the incidence of non value-adding activities during the construction process.
Event cameras, i.e., the Dynamic and Active-pixel Vision Sensor (DAVIS) ones, capture the intensi... more Event cameras, i.e., the Dynamic and Active-pixel Vision Sensor (DAVIS) ones, capture the intensity changes in the scene and generates a stream of events in an asynchronous fashion. The output rate of such cameras can reach up to 10 million events per second in high dynamic environments. DAVIS cameras use novel vision sensors that mimic human eyes. Their attractive attributes, such as high output rate, High Dynamic Range (HDR), and high pixel bandwidth, make them an ideal solution for applications that require high-frequency tracking. Moreover, applications that operate in challenging lighting scenarios can exploit the high HDR of event cameras, i.e., 140 dB compared to 60 dB of traditional cameras. In this paper, a novel asynchronous corner tracking method is proposed that uses both events and intensity images captured by a DAVIS camera. The Harris algorithm is used to extract features, i.e., frame-corners from keyframes, i.e., intensity images. Afterward, a matching algorithm is u...
2014 IEEE International Symposium on Circuits and Systems (ISCAS), 2014
403-MHz fully differential RF LNA was designed and implemented using 0.13 μm CMOS process. This d... more 403-MHz fully differential RF LNA was designed and implemented using 0.13 μm CMOS process. This design was targeted for low-power and low-cost direct conversion applications such as short-range radio in biomedical devices. This design consists of a differential CG-CS LNA with a positive- negative-feedback technique. The LNA occupies 150 μm× 120 μm active chip area, which is approximately 50% of that of the conventional LNA designs. The design achieves 31 dB conversion gain, 2.9 dB noise figure (NF) and an in-band IIP3 of 2 dBm. The design consumes 1.15mA from a 1.2V power supply.
Journal of Financial Management of Property and Construction, 2010
PurposeThe purpose of this paper is to identify and rank the factors that affect the bid/no bid d... more PurposeThe purpose of this paper is to identify and rank the factors that affect the bid/no bid decision according to their relative importance from the perspective of the contracting parties operating in the Gaza Strip, Palestine.Design/methodology/approachThe objectives of this research were investigated through a postal questionnaire, which covered a randomly selected sample of 63 contractors, 29 clients and 13 consultants operating in the construction industry in the Gaza strip. The questionnaire was structured based on related literature, the pilot study and actual factors affecting bidders' decisions to bid or not that arise from special conditions in the Gaza Strip. A total of 78 factors that affect the bid/no bid decision were identified. These factors were then ranked according to their relative importance to contracting parties operating in the Gaza Strip, Palestine.FindingsThe results illustrate that the financial capability of the contractors, the financial capabilit...
Engineering, Construction and Architectural Management, 2007
PurposeRecent knowledge management (KM) literature suggests that KM activities are not independen... more PurposeRecent knowledge management (KM) literature suggests that KM activities are not independent of each other, rather they interact with each other to form a process which receives input from both external and internal business environments, and then produces new knowledge for future utilisation. The purpose of this paper is to empirically investigate the relationships between KM activities within the construction business context in order to identify and map the pattern of their interactions.Design/methodology/approachA questionnaire survey was administered to a sample of contracting organisations operating in Hong Kong to elicit opinions of construction professionals on the intensity of KM activities currently being executed by their organisations in order to facilitate knowledge capture, sharing and utilisation. More than 150 respondents from 99 organisations responded to the survey. Additionally, a total of 15 semi‐structured interviews were undertaken to provide a unique per...
Leading organizations do not stop at the gathering and analysis of performance data; rather, thes... more Leading organizations do not stop at the gathering and analysis of performance data; rather, these organizations use performance measurement to stimulate improvement efforts and successfully translate strategy into action. In other words, they use performance measurement for managing their organizations. The most commonly used performance evaluation tool, the balanced scorecard (BSC) has been used extensively in the manufacturing, government, banking, retail, insurance and financial services sectors. This paper looks at potential applications and benefits of using the BSC as a framework to evaluate the performance improvement resulting from IT/IS implementation by a construction organization. The paper firstly seeks to adapt the original BSC concept to construction and then attempts to develop a performance measurement framework in the form of a tiered “Construct IT” BSC. The developed framework allows for the measurement of IT/IS performance at three different decision‐making tiers...
The discussers stated that the writers developed and analyzed the model properly throughout the t... more The discussers stated that the writers developed and analyzed the model properly throughout the text and made an excellent effort to adapt it for the characteristics of the construction industry. They suggested that the importance of education and training might be ...
Ideally, project documentation should be complete and there would be no need for subcontractors t... more Ideally, project documentation should be complete and there would be no need for subcontractors to seek further information from that which has already been provided. In practice, this is rarely the case. The use of "Request For Information" (RFI) as a formalised process, by which information is gathered or clarified is very common throughout the Australian construction industry. This paper focuses on the use of simulation-based modelling to quantify the time and cost associated with this process as currently communicated between construction organisations. Information gathered from construction projects plus expert advice sought from industry professionals is incorporated as model input. The model shows that the mean cycle time for a typical RFI can be as high as 17 person-hours with most of that time being spent on gathering and cross-referencing information. The simulation model was then modified to explore the potential of implementing Electronic Data Management Technologies as a tool to significantly reduce the time and cost associated with the traditional paper-based RFI process.
Kajewski, Stephen and Mohamed, Sherif and Tilley, Paul and Crawford, John and Chen, Swee-Eng and ... more Kajewski, Stephen and Mohamed, Sherif and Tilley, Paul and Crawford, John and Chen, Swee-Eng and Lenard, Dennis and Brewer, Graham and Gameson, Rod and Martins, Rui and Sher, Willy and Kolomy, Richard and Weippert, Achim and Caldwell, Geoff and Haug, ...
The Cooperative Research Centre for Construction Innovation (CRCCI) research project 2001-008-C:&... more The Cooperative Research Centre for Construction Innovation (CRCCI) research project 2001-008-C:'Project Team Integration: Communication, Coordination and Decision Support', is supported by a number of Australian industry, government and university ...
In an ideal world, the design and documentation provided for construction projects would be compl... more In an ideal world, the design and documentation provided for construction projects would be complete, precise and unambiguous. Unfortunately, this is rarely the case and quite often contractors are supplied with project documentation that is incomplete, conflicting or erroneous, ...
Construction managers have for a long time focused their attention on conversion processes, with ... more Construction managers have for a long time focused their attention on conversion processes, with little attention given to flow activities, leading to uncertain flow processes, expansion of non value-adding activities, and reduction of output value. This paper investigates the incidence of non value-adding activities in construction projects in Indonesia and Australia, focusing on non-residential building and infrastructure projects. Data was collected via questionnaires and personal interviews targeting 99 respondents from Indonesia and 50 respondents from Australia. A quantitative approach was adopted for this research utilising the results of a questionnaire survey involving 53 variables that relate to non value-adding activities. The variables were then separated into two classifications: waste categories that contribute to a reduction in the value of construction productivity and waste cause variables that could be defined as factors producing waste. Statistical analysis was performed to identify the different perceptions amongst the respondents and to determine the key variables of non value-adding activities. The paper illustrates the key waste categories, the key waste cause variables and leads the contractors to focus their attentions on these issues in order to reduce the incidence of non value-adding activities during the construction process.
Event cameras, i.e., the Dynamic and Active-pixel Vision Sensor (DAVIS) ones, capture the intensi... more Event cameras, i.e., the Dynamic and Active-pixel Vision Sensor (DAVIS) ones, capture the intensity changes in the scene and generates a stream of events in an asynchronous fashion. The output rate of such cameras can reach up to 10 million events per second in high dynamic environments. DAVIS cameras use novel vision sensors that mimic human eyes. Their attractive attributes, such as high output rate, High Dynamic Range (HDR), and high pixel bandwidth, make them an ideal solution for applications that require high-frequency tracking. Moreover, applications that operate in challenging lighting scenarios can exploit the high HDR of event cameras, i.e., 140 dB compared to 60 dB of traditional cameras. In this paper, a novel asynchronous corner tracking method is proposed that uses both events and intensity images captured by a DAVIS camera. The Harris algorithm is used to extract features, i.e., frame-corners from keyframes, i.e., intensity images. Afterward, a matching algorithm is u...
2014 IEEE International Symposium on Circuits and Systems (ISCAS), 2014
403-MHz fully differential RF LNA was designed and implemented using 0.13 μm CMOS process. This d... more 403-MHz fully differential RF LNA was designed and implemented using 0.13 μm CMOS process. This design was targeted for low-power and low-cost direct conversion applications such as short-range radio in biomedical devices. This design consists of a differential CG-CS LNA with a positive- negative-feedback technique. The LNA occupies 150 μm× 120 μm active chip area, which is approximately 50% of that of the conventional LNA designs. The design achieves 31 dB conversion gain, 2.9 dB noise figure (NF) and an in-band IIP3 of 2 dBm. The design consumes 1.15mA from a 1.2V power supply.
Journal of Financial Management of Property and Construction, 2010
PurposeThe purpose of this paper is to identify and rank the factors that affect the bid/no bid d... more PurposeThe purpose of this paper is to identify and rank the factors that affect the bid/no bid decision according to their relative importance from the perspective of the contracting parties operating in the Gaza Strip, Palestine.Design/methodology/approachThe objectives of this research were investigated through a postal questionnaire, which covered a randomly selected sample of 63 contractors, 29 clients and 13 consultants operating in the construction industry in the Gaza strip. The questionnaire was structured based on related literature, the pilot study and actual factors affecting bidders' decisions to bid or not that arise from special conditions in the Gaza Strip. A total of 78 factors that affect the bid/no bid decision were identified. These factors were then ranked according to their relative importance to contracting parties operating in the Gaza Strip, Palestine.FindingsThe results illustrate that the financial capability of the contractors, the financial capabilit...
Engineering, Construction and Architectural Management, 2007
PurposeRecent knowledge management (KM) literature suggests that KM activities are not independen... more PurposeRecent knowledge management (KM) literature suggests that KM activities are not independent of each other, rather they interact with each other to form a process which receives input from both external and internal business environments, and then produces new knowledge for future utilisation. The purpose of this paper is to empirically investigate the relationships between KM activities within the construction business context in order to identify and map the pattern of their interactions.Design/methodology/approachA questionnaire survey was administered to a sample of contracting organisations operating in Hong Kong to elicit opinions of construction professionals on the intensity of KM activities currently being executed by their organisations in order to facilitate knowledge capture, sharing and utilisation. More than 150 respondents from 99 organisations responded to the survey. Additionally, a total of 15 semi‐structured interviews were undertaken to provide a unique per...
Leading organizations do not stop at the gathering and analysis of performance data; rather, thes... more Leading organizations do not stop at the gathering and analysis of performance data; rather, these organizations use performance measurement to stimulate improvement efforts and successfully translate strategy into action. In other words, they use performance measurement for managing their organizations. The most commonly used performance evaluation tool, the balanced scorecard (BSC) has been used extensively in the manufacturing, government, banking, retail, insurance and financial services sectors. This paper looks at potential applications and benefits of using the BSC as a framework to evaluate the performance improvement resulting from IT/IS implementation by a construction organization. The paper firstly seeks to adapt the original BSC concept to construction and then attempts to develop a performance measurement framework in the form of a tiered “Construct IT” BSC. The developed framework allows for the measurement of IT/IS performance at three different decision‐making tiers...
The discussers stated that the writers developed and analyzed the model properly throughout the t... more The discussers stated that the writers developed and analyzed the model properly throughout the text and made an excellent effort to adapt it for the characteristics of the construction industry. They suggested that the importance of education and training might be ...
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Papers by Sherif Mohamed