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Articles 1 - 30 of 163
Full-Text Articles in Engineering
Strider: Manufacturing Processes, Michael Warren-Angelucci
Strider: Manufacturing Processes, Michael Warren-Angelucci
Industrial and Manufacturing Engineering
The goal of the Strider Project is to create a mobility device that can support a person with weakened leg strength and enable them to be supported and maintain a standing position. A prototype of the Strider was created by three Mechanical Engineering students as their senior project. The topic of this senior project was to analyze and create a manufacturing process for the manufacture of the Strider that will be ergonomic and cost effective.
There were many things that needed to be accomplished in order to create the manufacturing process. The first step was to verify that the prototype …
An Unabridged Approach To Lean Implementation: Understanding The Impact Systemically And Supporting The Operational Changes, Joseph D. Wolkiewicz
An Unabridged Approach To Lean Implementation: Understanding The Impact Systemically And Supporting The Operational Changes, Joseph D. Wolkiewicz
Industrial Technology Theses
Lean Material Strategy (Lean) has become a governing principle for many companies. These strategies help managers identify waste within the process, and once visible, drive it from the system. One of the principal objectives of this approach is to achieve greater manufacturing efficiency. It is current practice, at a publically held automotive corporation (Company X), to employ Lean in new program launches for its manufacturing sites. While Lean served as the theoretical foundation for design of new assembly systems at Company X sites, insufficient consideration was given to developing an integrated “big picture” solution to the implementation of these new …
Integrated Production And Distribution Problem With Single Perishable Product, Wennian Li
Integrated Production And Distribution Problem With Single Perishable Product, Wennian Li
All Dissertations
This dissertation investigated the extension of the Integrated Production and Distribution Scheduling Problem (IPDSPP) using a variety of perishable products, applying the JIP principle and make-to-order strategy to integrate the production and distribution schedules. A single perishable product with a constant lifetime after production was used in the model discussed here. The objective of the problem was to find the solution that results in minimal system total transportation costs while satisfying customer demand within a fixed time horizon. In the solution, the fleet size, vehicle route and distribution schedule, plant production batch size and schedule were determined simultaneously. This research …
Managing Elective And Non-Elective Case Assignments For An Operating Room Suite, Narges Hosseini
Managing Elective And Non-Elective Case Assignments For An Operating Room Suite, Narges Hosseini
All Dissertations
The success of operating room management depends on all levels of decision making, from strategic to tactical and operational decisions. One key decision in systems with block booking is to assign sufficient amount of block time to surgeons and surgery groups. While the typical method of block assignment identifies the share of surgery groups from OR times based on average of past usage, this method does not count for the difference between cost of under and overtime. One of the goals of this research is to develop a decision framework for block assignment. This work is presented in chapter two. …
Updated Force Model For Milling Nickel-Based Superalloys, Andrew Henderson
Updated Force Model For Milling Nickel-Based Superalloys, Andrew Henderson
All Dissertations
Nickel-based superalloys are commonly used in applications which require high strength and resistance to creep and oxidation in extreme conditions. All nickel-based superalloys are considered difficult to machine; however, cast gamma-prime-strengthened nickel-based superalloys are more difficult to machine than common nickel-based superalloys. Machining comprises a significant portion of manufacturing processes and with advancements in technology and material properties, the methods and models used must be adapted in order to keep pace.
In this research, correlations are made, using fundamental principles, between measurements made with on-machine touch probes and the cutting tool's wear state, those correlations are used in an adaptive …
Supply Chain Network Design: Risk-Averse Vs. Risk-Neutral Decision Making, Alireza Madadi
Supply Chain Network Design: Risk-Averse Vs. Risk-Neutral Decision Making, Alireza Madadi
All Dissertations
Recent events, such as the Heparin tragedy, highlight the necessity for designers and planners of supply chain networks to consider the risk of disruptions in spite of their low probability of occurrence. One effective way to hedge against supply chain network disruptions is to have a robustly designed supply chain network. This involves strategic decisions, such as choosing which markets to serve, which suppliers to source from, the location of plants, the types of facilities to use, and tactical decisions, such as production and capacity allocation. In this dissertation, we focus on models for designing supply chain networks that are …
On The Maintenance Modeling And Optimization Of Repairable Systems: Two Different Scenarios, Suzan Alaswad
On The Maintenance Modeling And Optimization Of Repairable Systems: Two Different Scenarios, Suzan Alaswad
Graduate Theses and Dissertations
The use of mathematical modeling for the purpose of analyzing and optimizing the performance of repairable systems is widely studied in the literature. In this dissertation, we study two different scenarios on the maintenance modeling and optimization of repairable systems. First, we study the long-run availability of a traditional repairable system that is subjected to imperfect corrective maintenance. We use Kijima's second virtual age model to describe the imperfect repair process. Because of the complexity of the underlying probability models, we use simulation modeling to estimate availability performance and meta-modeling to convert the reliability and maintainability parameters of the repairable …
Container Handling Algorithms And Outbound Heavy Truck Movement Modeling For Seaport Container Transshipment Terminals, Mazen I. Hussein
Container Handling Algorithms And Outbound Heavy Truck Movement Modeling For Seaport Container Transshipment Terminals, Mazen I. Hussein
Theses and Dissertations
This research is divided into four main parts. The first part considers the basic block relocation problem (BRP) in which a set of shipping containers is retrieved using the minimum number of moves by a single gantry crane that handles cargo in the storage area in a container terminal. For this purpose a new algorithm called the look ahead algorithm has been created and tested. The look ahead algorithm is applicable under limited and unlimited stacking height conditions. The look ahead algorithm is compared to the existing algorithms in the literature. The experimental results show that the look ahead algorithm …
A Process Analysis Of Engineering Problem Solving And Assessment Of Problem Solving Skills, Sarah Grigg
A Process Analysis Of Engineering Problem Solving And Assessment Of Problem Solving Skills, Sarah Grigg
All Dissertations
In the engineering profession, one of the most critical skills to possess is accurate and efficient problem solving. Thus, engineering educators should strive to help students develop skills needed to become competent problem solvers. In order to measure the development of skills, it is necessary to assess student performance, identify any deficiencies present in problem solving attempts, and identify trends in performance over time. Through iterative assessment using standard assessment metrics, researchers/instructors are able to track trends in problem solving performance across time, which can serve as a gauge of students' learning gains.
This research endeavor studies the problem solving …
Flow Behavior Modeling And Process Control Of Electrically-Assisted Forming (Eaf) For Sheet Metals In Uniaxial Tension, Joshua Jones
Flow Behavior Modeling And Process Control Of Electrically-Assisted Forming (Eaf) For Sheet Metals In Uniaxial Tension, Joshua Jones
All Dissertations
This work studies the influence of an applied electrical current on magnesium sheet metal and introduces models which are successful in predicting the deformation behavior (i.e. material flow stress, local material strain, and thermal response). Also, this work examined the theory of electroplasticity by studying prior proposed theories and by quantifying the prior theories potential for improved dislocation mobility. From this analysis, a single dominant mechanism is determined and the theory of electroplasticity is explained using this single mechanism. The theory discussed in this work is supported by experimental testing and microstructure analysis.
In addition to studying the exact electroplastic …
Chsr Clothing: How To Start A Small Business Clothing Line To Be Run Efficiently With Minimum Capital And Maximum Profit, Kayvon Banisalam
Chsr Clothing: How To Start A Small Business Clothing Line To Be Run Efficiently With Minimum Capital And Maximum Profit, Kayvon Banisalam
Industrial and Manufacturing Engineering
Executive Summary
Many clothing brands have failed because they did not design marketable products with a suitable business plan. Often times, clothing brand owners do not use the capital they possess in efficient ways. They can get caught off guard with unexpected costs and are not running the business in the most resourceful and professional way.
The goal of this project is to create a clothing brand that portrays distinctive designs to go along with an effective business model. This includes implementing decision analysis at several points of the planning phase, along with quality and cost controls. Creating quality products …
Design And Manufacture Of Natural Composite Canoe, Derek Baptista
Design And Manufacture Of Natural Composite Canoe, Derek Baptista
Industrial and Manufacturing Engineering
Abstract
This report looks into the application and feasibility of manufacturing natural composite canoes. The main fabrics that were analyzed are flax, hemp, and jute. These were then compared to carbon fiber and fiberglass to see the difference in mechanical properties. It was found that the natural fibers have lower mechanical properties but that this could be overcome by designing a balsa wood core with ribs running up the walls. After manufacturing a hemp canoe, many lesson were learned and areas of interest were further explored. With the use of different natural fibers, these canoes can greatly reduce the carbon …
Process Improvements For Establishing Cmmi Certification At Company Xyz, Megan Farrell
Process Improvements For Establishing Cmmi Certification At Company Xyz, Megan Farrell
Industrial and Manufacturing Engineering
CMMI stands for Capability Maturity Model Integration and is an enterprise-wide Process-Improvement model that provides a set of best practices that addresses productivity, performance, costs, and stakeholder satisfaction. This improvement model is generally used in computer software companied and not only does it improve their processes, but many contracts will only be awarded with those companies who are CMMI certified, so it is very important for Company XYZ. This goal of this project was to help improve the CMMI efforts at Company XYZ in 4 of the 20 distinct processes areas to attain a CMMI Maturity Level of 3. Improvement …
Facilities Planning For An Aerospace Manufacturing Company, William Petrossi
Facilities Planning For An Aerospace Manufacturing Company, William Petrossi
Industrial and Manufacturing Engineering
Absolute Technologies Inc. (ATI) has been growing for years, and is running out of space at their current manufacturing facility in Yorba Linda, CA. ATI will be moving to a much larger facility this winter. They are looking for an efficient way to utilize this space. The machine positions were taken as fixed, seeing as a lean expert was brought in to give advice on placement. With the machines fixed, the scope was narrowed to other areas.
A systematic approach to facilities design is utilized. First, a goal needs to be defined. The goal is to reduce the time wasted …
Consolidation Of Company Abc, Estelle Sillari-Owen
Consolidation Of Company Abc, Estelle Sillari-Owen
Industrial and Manufacturing Engineering
This project aims to solve Company ABC’s issues in order to keep the company afloat and to keep the company profitable. This was done by reducing Company ABC’s organizational and inventory build-up issues. The project aims to reduce the company’s dependence on outside storage, with plans of consistent inventory reduction over the next year. An implementation plan was created to ensure the company keeps on track to increase profits and prevent against increasing inventory costs.
Evaluating Dynamic ‘Landing Gear Unsafe’ Auditory Alerts As A Defense Against Habituation, Vincenzo Fasano
Evaluating Dynamic ‘Landing Gear Unsafe’ Auditory Alerts As A Defense Against Habituation, Vincenzo Fasano
Doctoral Dissertations and Master's Theses
Auditory alerts are widely used in today's daily routine. Unlike their visual counterparts, auditory alerts can be used to capture someone's attention, even though the user is not within visual range. As beneficial as auditory alerts can be, it is possible to become habituated to alerts. Habituation is the elimination of a response as a result of continuous exposure to a stimulus. In this small-scale study, methods to reduce pilot habituation to the 'landing gear unsafe' auditory alert were investigated. Ten subjects executed eight non-precision instrument approaches that exposed the subjects to the 'landing gear unsafe' auditory alert for a …
Reliability Analysis Of Low-Silver Bga Solder Joints Using Four Failure Criteria, Erin A. Kimura
Reliability Analysis Of Low-Silver Bga Solder Joints Using Four Failure Criteria, Erin A. Kimura
Master's Theses
The appropriate selection of failure criterion for solder joint studies is necessary to correctly estimate reliability life. The objective of this study is to compare the effect of different failure criteria on the reliability life estimation. The four failure criteria in this study are a 20% resistance increase defined in the IPC-9701A standard, a resistance beyond 500 Ω, an infinite resistance (hard open), and a failure criterion based on X-bar and R control charts. Accelerated thermal cycling conditions of a low-silver BGA study included 0°C to 100 °C with ten minute dwell times and -40°C to 125°C with ten minute …
Third-Party Quality Management Audits For Automotive Component Manufacturing: Perceptions And Insights Into A Necessary Yet Debatable Practice, Christopher Kluse
Third-Party Quality Management Audits For Automotive Component Manufacturing: Perceptions And Insights Into A Necessary Yet Debatable Practice, Christopher Kluse
Master's Theses and Doctoral Dissertations
Third-party quality audits have been a continued practice within the manufacturing community since release of the ISO 9000 standard in 1987. In recent times, many within the manufacturing industry are questioning the value of the audit process. (Sayle, 1995, Sayle 1999, Douglas, 2000, Gordon, 2000, Dalgleish 2006) Consequently, a need exists to better understand the impacts and perceptions of the third-party auditing process. This research used a grounded theory approach to explore the following question: How do management representatives perceive the third-party audit process?
Collection of data consisted of 25 in-depth interviews taken from management representatives within the automotive industry. …
Warehouse Redesign, Cristine Carmel Dewar
Warehouse Redesign, Cristine Carmel Dewar
Industrial and Manufacturing Engineering
A young, growing biomedical company is expanding its warehouse space to keep up with the increasing production. This project’s goals were to recommend a layout and improve a process that would minimize the distance traveled by the material handlers, increase the safety of the warehouse by implementing visual controls, implement ergonomics to reduce chance of injury, and save money for the company. To achieve this first I familiarized myself with their current processes and department and the space required for their current and future production levels. Next I created two alternative layouts, the first (Layout A) to minimize distance and …
The Factors Behind A Successful Implementation Of Electronic Health Records Systems, Anjee Gorkhali
The Factors Behind A Successful Implementation Of Electronic Health Records Systems, Anjee Gorkhali
Engineering Management & Systems Engineering Theses & Dissertations
This research explores the role that budget for Information System (IS) and technical expertise of healthcare service provider staff play on the successful leap from a partial to exhaustive implementation of Electronic Health Records (EHR) Systems. Technical expertise in Information Systems might not be easily measurable directly, but there are a number of indicators that could be used as a proxy, such as: Information System (IS) Department Budget, number of IS staff and the extent of technical trainings provided by the IS department to the clinical staff. This research study hypothesizes that quality technical trainings conducted by an IS department …
Level Of Agreement In The Mental Models Of Human Factors Practitioners And Systems Engineers Working In Collaborative Teams, Jerry A. Gordon
Level Of Agreement In The Mental Models Of Human Factors Practitioners And Systems Engineers Working In Collaborative Teams, Jerry A. Gordon
Doctoral Dissertations and Master's Theses
Emerging research in complexity science recognizes traditional techniques for engineering systems do not always work for complex systems. Designing complex systems requires individuals to have knowledge of engineering as well as human performance. To this end, design efforts rely often on multi-disciplinary teams. While any two members of a design team may view the system design problem in vastly different manners, this study sought to identify a possible systemic effect on approach by the differing education and experience obtained by social practitioners, represented by human factors, and technical practitioners, represented by systems engineers. It further examined the impact of the …
Minimization Of Collateral Damage In Airdrops And Airstrikes, Steven P. Dillenburger
Minimization Of Collateral Damage In Airdrops And Airstrikes, Steven P. Dillenburger
Theses and Dissertations
Collateral damage presents a significant risk during air drops and airstrikes, risking citizens' lives and property, straining the relationship between the United States Air Force and host nations. This dissertation presents a methodology to determine the optimal location for making supply airdrops in order to minimize collateral damage while maintaining a high likelihood of successful recovery. A series of non-linear optimization algorithms is presented along with their relative success in finding the optimal location in the airdrop problem. Additionally, we present a quick algorithm for accurately creating the Pareto frontier in the multi-objective airstrike problem. We demonstrate the effect of …
Effective Measurement Of Reliability Of Repairable Usaf Systems, Louis J. Hogge
Effective Measurement Of Reliability Of Repairable Usaf Systems, Louis J. Hogge
Theses and Dissertations
The USAF generally does not know the reliability of its fielded repairable systems. The reported metric, Mean Time Between Failure (MTBF), is too lagging to be actionable in the best case, and is not representative of actual system reliability in the worst case. This thesis investigates the statistical techniques for measurement and analysis of the reliability of fielded repairable systems, which are very different than nonrepairables. To frame the investigation, a comparison is made between the generally accepted definitions and metrics and those used across the US Air Force (USAF). Reliability can be analyzed in four context areas: reliability prediction …
The Multiobjective Average Network Flow Problem: Formulations, Algorithms, Heuristics, And Complexity, Jeremy D. Jordan
The Multiobjective Average Network Flow Problem: Formulations, Algorithms, Heuristics, And Complexity, Jeremy D. Jordan
Theses and Dissertations
Integrating value focused thinking with the shortest path problem results in a unique formulation called the multiobjective average shortest path problem. We prove this is NP-complete for general graphs. For directed acyclic graphs, an efficient algorithm and even faster heuristic are proposed. While the worst case error of the heuristic is proven unbounded, its average performance on random graphs is within 3% of the optimal solution. Additionally, a special case of the more general biobjective average shortest path problem is given, allowing tradeoffs between decreases in arc set cardinality and increases in multiobjective value; the algorithm to solve the average …
Systems Engineering Applications For Small Business Innovative Research (Sbir) Projects, Phillip J. O'Connell
Systems Engineering Applications For Small Business Innovative Research (Sbir) Projects, Phillip J. O'Connell
Theses and Dissertations
This research defined Systems Engineering applications for Small Business Innovative Research (SBIR) projects and answered five research questions addressing the essential elements and application of SE processes within the SBIR community. The research identified that current DoD and Air Force SE Policy do not specifically address SBIR projects. This research identified the need to tailor a SE approach for SBIR projects as overarching policy is not applicable in all cases. The culmination of this effort defined the current SE tasks applicable for the SBIR community.
Container-Handling Operation Optimization At Koja Container Terminal, Moh Taufik Hidayat
Container-Handling Operation Optimization At Koja Container Terminal, Moh Taufik Hidayat
World Maritime University Dissertations
No abstract provided.
Study On Optimal Dwell Time At Jakarta International Container Terminal, Siti Nurrochmah Badrudin
Study On Optimal Dwell Time At Jakarta International Container Terminal, Siti Nurrochmah Badrudin
World Maritime University Dissertations
No abstract provided.
Design And Implementation Of Erp Software In Material Supply Chain Management For Siix Corp., Xing'er Chen
Design And Implementation Of Erp Software In Material Supply Chain Management For Siix Corp., Xing'er Chen
World Maritime University Dissertations
No abstract provided.
Freight Forecasting Of Dry Bulk Market Based On The Bp Neural Network, Qianran Huang
Freight Forecasting Of Dry Bulk Market Based On The Bp Neural Network, Qianran Huang
World Maritime University Dissertations
No abstract provided.
The Rationality Study On Capacity Allocation For Cscl’S Asia-Europe Route, Yan Zhou
The Rationality Study On Capacity Allocation For Cscl’S Asia-Europe Route, Yan Zhou
World Maritime University Dissertations
No abstract provided.