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Articles 1 - 8 of 8
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
A Control-Chart Based Method For Solder Joint Crack Detection, Jianbiao Pan
A Control-Chart Based Method For Solder Joint Crack Detection, Jianbiao Pan
Industrial and Manufacturing Engineering
Many researchers have used different failure criteria in published solder joint reliability studies. Since the reported timeto-failure would be different if different failure criteria were used, it would be difficult to compare the reported reliability life of solder joints from one study to another. The purpose of this study is to evaluate the effect of failure criteria on the reported thermal fatigue life and determine which failure criterion could detect failure sooner. First, the application of the control-chart-based method in a thermal cycling reliability study is described. The reported time-to-failure data were then compared based on four different failure criteria: …
Local Buckling Behavior Of Round Steel Tubes Subjected To Compressive Loads, Joseph Moore, Ben Fell
Local Buckling Behavior Of Round Steel Tubes Subjected To Compressive Loads, Joseph Moore, Ben Fell
STAR Program Research Presentations
This project will investigate the local buckling induced fracture behavior of round steel tubes subjected to axial compressive loads, representative of observed failures in buried pipelines during seismic events. Nine initial tests will be conducted across three lengths of round steel tube: 8”, 12”, and 20”. Another twelve tests will be conducted on the lengths of 12” and 20” to test varying initial compressive force upon the round steel tubes. Three D/t ratios will be considered for each length of round steel tube: 52.6, 78.9, and 121.2. To verify the material properties of the test specimens an ancillary tensile coupon …
Cost Performance Dynamics In Lean Production Leveling, Ahmed Deif, Hoda Elmaraghy
Cost Performance Dynamics In Lean Production Leveling, Ahmed Deif, Hoda Elmaraghy
Industrial Technology and Packaging
Balancing of production systems is one of the main lean manufacturing principles as it reduces in-process storage and related forms of waste. A dynamic systems approach is proposed to investigate challenges of implementing production leveling and associated costs. A lean cell producing at takt time is modeled using system dynamics. The model captures various lean tools influencing production leveling and their implications. Comparative cost analysis between various leveling implementation policies for stochastic demand with multiple products is conducted. Results showed that determining the most feasible leveling policy is highly dictated by both the cost and limitations of capacity scalability. In …
Dynamic Modelling Of Impact Of Lean Policies On Production Levelling Feasibility, Hoda Elmaraghy, Ahmed Deif
Dynamic Modelling Of Impact Of Lean Policies On Production Levelling Feasibility, Hoda Elmaraghy, Ahmed Deif
Industrial Technology and Packaging
A dynamic systems approach is proposed to investigate challenges of implementing production leveling and associated costs. A model of a lean cell is developed using system dynamics. The model captures various lean tools influencing production leveling. Comparative cost analysis between various leveling implementation policies for stochastic demand with multiple products is conducted. Results showed that determining the most feasible leveling policy is highly dictated by both capacity scalability cost and limitations. The developed model and revealed insights can help lean practitioners to better decide on when and how to implement production leveling as well as determine production lots sizes.
Impact Of Dynamic Capacity Policies On Wip Level In Mix Leveling Lean Environment, Ahmed Deif, Hoda Elmaraghy
Impact Of Dynamic Capacity Policies On Wip Level In Mix Leveling Lean Environment, Ahmed Deif, Hoda Elmaraghy
Industrial Technology and Packaging
Balancing demand's product variety in production planning is one aspect of variety management challenge. This phenomenon is described in lean systems as mix leveling. This paper approach product mix leveling problem from a dynamic perspective. A system dynamics model is developed to explore the dynamics associated with the WIP level performance at different mix leveling policies in a lean environment. The system captures different lean tools and policies. Results showed that the best WIP performance is sensitive to both the degree of lean tools implementation as well as the capacity scalability level of the system. The presented analysis showed that …
Dynamic Lean Assessment For Takt Time Implementation, Rehab M. Ali, Ahmed M. Deif
Dynamic Lean Assessment For Takt Time Implementation, Rehab M. Ali, Ahmed M. Deif
Industrial Technology and Packaging
Increasing volatility, global competitiveness, and sales crisis all force the manufacturers to commit to the journey of world-class manufacturing performance via adopting “lean systems” to enable economic success in difficult times. Among the journey to lean, one of the hardest steps is measuring the progress of lean polices implementation especially in this highly dynamic market. This paper presents a dynamic model to evaluate the degree of leanness in manufacturing firms. The model is based on system dynamics approach and presents a “leanness score” for the manufacturing system. In addition, it examines the dynamics associated with the application of “One-piece flow” …
An Integrated Approach To Assess Manufacturing Greeness Level, Ahmed H. Salen, Ahmed Deif
An Integrated Approach To Assess Manufacturing Greeness Level, Ahmed H. Salen, Ahmed Deif
Industrial Technology and Packaging
This paper proposes an integrated approach for relative greenness level assessment in selected manufacturing industries at the system level. The approach builds on existing methodologies to develop a multi-layer tool box called “Greenometer” which focus on the strategic comparison for cross industries evaluation as well as tactical comparison for intra-industries. The assessment tool captures the fundamental evaluation parameters of green manufacturing namely; Environment, Energy, Resources and Economy. In addition, the Greenometer employs geometric mean method (GMM) for the strategic layer and data envelopment analysis (DEA) for the tactical layer and will be used for different selected manufacturing disciplines. The proposed …
A Control-Chart Based Method For Solder Joint Crack Detection - Conference Proceeding, Jianbiao Pan
A Control-Chart Based Method For Solder Joint Crack Detection - Conference Proceeding, Jianbiao Pan
Industrial and Manufacturing Engineering
Many researchers have used different failure criteria in the published solder joint reliability studies. Since the reported time-to-failure would be different if different failure criteria were used, it would be difficult to compare the reported reliability life of solder joints from one study to another. The purpose of this study is to evaluate the effect of failure criteria on the reported thermal fatigue life and find out which failure criterion can detect failure sooner. First, the application of the control-chart based method in a thermal cycling reliability study is described. The reported time-to-failure data were then compared based on four …