A project control system aims to minimize the gap between project planning and project execution ... more A project control system aims to minimize the gap between project planning and project execution in order to achieve project aims, i.e., cost, time, and content. This paper reviews the current literature on project control systems. The first part provides an overview of the nature and importance of project control. The second part deals with current project control tools and techniques, followed by a discussion on the advantages and disadvantages of these systems.
Artificial intelligence tools have recently become a significant topic in many areas of engineeri... more Artificial intelligence tools have recently become a significant topic in many areas of engineering research. The use of computer-based decision support systems is potentially of great benefit in the complex task of process planning, both in terms of consistency of approach and in the reduction of manufacturing lead times. This paper discusses a problem-solving system which carries out process planning tasks for a small flexible manufacturing system.
Project control systems often fail to support management in achieving their global project goals.... more Project control systems often fail to support management in achieving their global project goals. This paper propose a MPCS (Multidimensional Project Control System) as a quantitative approach for quantifying deviations from the planning phase to the execution phase with ...
Data envelope analysis (DEA) is currently applied to ongoing organizations such as hospitals, pol... more Data envelope analysis (DEA) is currently applied to ongoing organizations such as hospitals, police stations, schools, etc. This paper investigates the possibility of using the DEA approach for evaluating the performances of projects in a multi-project environment, where each project is usually a one-time non-repeated event. Projects are evaluated by the earned value management system (EVMS) and the multidimensional control system (MPCS) methods. In this environment, it is usually necessary to reduce the number of outputs and inputs not to exceed the number of projects. This paper deals with a method for their reduction. The paper illustrates a detailed example on how to apply and interpret the DEA method in a multi-project environment.
Generally, very little attention is given to the metallurgical condition of a machined surface. H... more Generally, very little attention is given to the metallurgical condition of a machined surface. However, a common feature is the occurrence of a very hard and thin white layer at the surface which affects the properties of the material. The nature of the white layer formed on an EN. 24 steel by centreless grinding is described, and the effects of workpiece speed and grinding-wheel condition on the thickness of the white layer are presented and the results discussed in terms of Shaw's indentation model of grinding. Surface roughness is shown not to be a measure of the thickness of the white layer.
... Improvements in Centreless Grinding Machine Design WB Rowe, S. Spraggett and R. GiII/UK - Sub... more ... Improvements in Centreless Grinding Machine Design WB Rowe, S. Spraggett and R. GiII/UK - Submitted by 6. J. Davies (1) Received on ... 2. Application cf Abbi Principle to Centreless Crm Machine Laye There are other weaknesses in conventional machines from a structural ...
A model that simulates the rounding up action of rollers for bearings using the centreless grindi... more A model that simulates the rounding up action of rollers for bearings using the centreless grinding process is presented. The basic model can be visualised by representing a centreless grinding machine in which the grinding wheel advances towards the control wheel and the work blade during the infeed cycle. Incorporated in the model is an oscillatory motion of the grinding wheel about its axis, the amplitude of which depends on the magnitude of unbalance of the grinding wheel. Workpiece speed, geometric configuration and grinding wheel speed were varied whilst other process variables were held constant. The criteria for assessing the roundness profiles of the rollers were computed roundness traces. Data obtained revealed that the geometric configuration was more influential than grinding wheel unbalance in governing the number of waves on the workpiece. For a given set of parameters, it is possible to predict the final roundness profiles of rollers using the model. A more sophisticated model based on the dynamic properties of the process has also been developed.
A project control system aims to minimize the gap between project planning and project execution ... more A project control system aims to minimize the gap between project planning and project execution in order to achieve project aims, i.e., cost, time, and content. This paper reviews the current literature on project control systems. The first part provides an overview of the nature and importance of project control. The second part deals with current project control tools and techniques, followed by a discussion on the advantages and disadvantages of these systems.
Artificial intelligence tools have recently become a significant topic in many areas of engineeri... more Artificial intelligence tools have recently become a significant topic in many areas of engineering research. The use of computer-based decision support systems is potentially of great benefit in the complex task of process planning, both in terms of consistency of approach and in the reduction of manufacturing lead times. This paper discusses a problem-solving system which carries out process planning tasks for a small flexible manufacturing system.
Project control systems often fail to support management in achieving their global project goals.... more Project control systems often fail to support management in achieving their global project goals. This paper propose a MPCS (Multidimensional Project Control System) as a quantitative approach for quantifying deviations from the planning phase to the execution phase with ...
Data envelope analysis (DEA) is currently applied to ongoing organizations such as hospitals, pol... more Data envelope analysis (DEA) is currently applied to ongoing organizations such as hospitals, police stations, schools, etc. This paper investigates the possibility of using the DEA approach for evaluating the performances of projects in a multi-project environment, where each project is usually a one-time non-repeated event. Projects are evaluated by the earned value management system (EVMS) and the multidimensional control system (MPCS) methods. In this environment, it is usually necessary to reduce the number of outputs and inputs not to exceed the number of projects. This paper deals with a method for their reduction. The paper illustrates a detailed example on how to apply and interpret the DEA method in a multi-project environment.
Generally, very little attention is given to the metallurgical condition of a machined surface. H... more Generally, very little attention is given to the metallurgical condition of a machined surface. However, a common feature is the occurrence of a very hard and thin white layer at the surface which affects the properties of the material. The nature of the white layer formed on an EN. 24 steel by centreless grinding is described, and the effects of workpiece speed and grinding-wheel condition on the thickness of the white layer are presented and the results discussed in terms of Shaw's indentation model of grinding. Surface roughness is shown not to be a measure of the thickness of the white layer.
... Improvements in Centreless Grinding Machine Design WB Rowe, S. Spraggett and R. GiII/UK - Sub... more ... Improvements in Centreless Grinding Machine Design WB Rowe, S. Spraggett and R. GiII/UK - Submitted by 6. J. Davies (1) Received on ... 2. Application cf Abbi Principle to Centreless Crm Machine Laye There are other weaknesses in conventional machines from a structural ...
A model that simulates the rounding up action of rollers for bearings using the centreless grindi... more A model that simulates the rounding up action of rollers for bearings using the centreless grinding process is presented. The basic model can be visualised by representing a centreless grinding machine in which the grinding wheel advances towards the control wheel and the work blade during the infeed cycle. Incorporated in the model is an oscillatory motion of the grinding wheel about its axis, the amplitude of which depends on the magnitude of unbalance of the grinding wheel. Workpiece speed, geometric configuration and grinding wheel speed were varied whilst other process variables were held constant. The criteria for assessing the roundness profiles of the rollers were computed roundness traces. Data obtained revealed that the geometric configuration was more influential than grinding wheel unbalance in governing the number of waves on the workpiece. For a given set of parameters, it is possible to predict the final roundness profiles of rollers using the model. A more sophisticated model based on the dynamic properties of the process has also been developed.
Uploads
Papers by S Spraggett