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Cad Vs. Sketching: An Exploratory Case Study, David Veisz, Essam Z. Namouz, Shraddha Joshi, Joshua D. Summers
Cad Vs. Sketching: An Exploratory Case Study, David Veisz, Essam Z. Namouz, Shraddha Joshi, Joshua D. Summers
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This paper presents a preliminary comparison between the role of computer-aided design (CAD) and sketching in engineering through a case study of a senior design project and interviews with industry and academia. The design team consisted of four senior level mechanical engineering students each with less than 1 year of professional experience are observed while completing an industry sponsored mechanical engineering capstone design project across a 17 week semester. Factors investigated include what CAD tools are used, when in the design process they are implemented, the justification for their use from the students' perspectives, the actual knowledge gained from their …
Assembly Time Modeling Through Connective Complexity Metrics, James L. Mathieson, Bradley A. Wallace, Joshua D. Summers
Assembly Time Modeling Through Connective Complexity Metrics, James L. Mathieson, Bradley A. Wallace, Joshua D. Summers
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This paper presents an approach for the development of surrogate models predicting the assembly time of a system based on complexity metrics of the physical system architecture when detailed geometric information is unavailable. A convention for modelling physical architecture is presented, followed by a sample of 10 analysed systems used for training and three systems used for validation. These systems are evaluated on complexity metrics developed from graph theoretic measures. An example model is developed based on a series of regressions of trends observed within the sample data. This is validated against the systems that are not used to develop …
Mobile Devices Within Manufacturing Environments: A Bmw Applicability Study, Beshoy Morkos, Torsten Rilka, Joachim Taiber, Joshua D. Summers, Laine Mears, Georges Fadel
Mobile Devices Within Manufacturing Environments: A Bmw Applicability Study, Beshoy Morkos, Torsten Rilka, Joachim Taiber, Joshua D. Summers, Laine Mears, Georges Fadel
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With the growing need of mobile devices within manufacturing industries, new domains for their use in automotive OEMs have emerged. Advent technology has enabled the development of devices such as ultra-mobile personal computers that provide the function of a computer in a compact, mobile configuration and augmented reality (wearable mobile devices) in a production environment where hands free operation is essential. The use of mobile devices allows for more effective communication and data sharing/recording. This paper details BMW’s preliminary investigation and applicability study of implementing mobile devices within their manufacturing environment to view potential benefits that could be achieved. Manufacturing …
Reasons For Change Propagation: A Case Study In An Automotive Oem, Prabhu Shankar, Beshoy Morkos, Joshua D. Summers
Reasons For Change Propagation: A Case Study In An Automotive Oem, Prabhu Shankar, Beshoy Morkos, Joshua D. Summers
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This paper focuses on identifying the reasons for change propagation during the production phase of the product life cycle. Unlike the traditional change propagation study where the focus is within the product, this study is focused to understand the propagation effects of change on other functional silos in the manufacturing firm. First, the reasons for the changes are identified using archival analysis through which it is found that 77.0 % of changes are due to internal reasons while 23.0 % are external. Second, these changes are distinguished into genesis, and propagated changes using a matrix-based modeling approach from which the …
Predicting Requirement Change Propagation Using Higher Order Design Structure Matrices: An Industry Case Study, Beshoy Morkos, Prabhu Shankar, Joshua D. Summers
Predicting Requirement Change Propagation Using Higher Order Design Structure Matrices: An Industry Case Study, Beshoy Morkos, Prabhu Shankar, Joshua D. Summers
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This research examines higher order design structure matrices as requirements change modelling tools to predict requirement change propagation through two large-scale industry design projects. Due to the iterative nature of design, requirements will evolve and change. Changes in requirements can propagate to other requirements on different subsystems leading to possible increases in the project cost and lead-time. Predicting these requirement changes enables the designers to foresee unanticipated changes and maximises the probability for the project's success. These studies reveal that second-order relationships are influential in predicting requirement change propagation. Unforeseen propagation occurring in first-order form was rare, rather it was …