Industrial Engineering Commons^™

Reliability Estimation Of Reciprocating Seals Based On Multivariate Dependence Analysis And It's Experimental Validation, Chao Zhang, Rentong Chen, Shaoping Wang, Yujie Qian, Mileta M. Tomovic

Engineering Technology Faculty Publications

Accurate reliability estimation for reciprocating seals is of great significance due to their wide use in numerous engineering applications. This work proposes a reliability estimation method for reciprocating seals based on multivariate dependence analysis of different performance indicators. Degradation behavior corresponding to each performance indicator is first described by the Wiener process. Dependence among different performance indicators is then captured using D-vine copula, and a weight-based copula selection method is utilized to determine the optimal bivariate copula for each dependence relationship. A two-stage Bayesian method is used to estimate the parameters in the proposed model. Finally, a reciprocating seal degradation …

Training The Active Duty Naval Workforce Using The Digital Thread To Design/Redesign Basic Models With Validation Through The Additive Manufacturing, Vukica M. Jovanovic, Anthony W. Dean, Karina Arcaute, Michel Audette, Dipankar Ghosh

Engineering Technology Faculty Publications

This digest will showcase one approach to teaching engineering graphics and design for the active duty naval workforce. Sailors are exposed to solid modeling fundamentals during the two-day long workshop. Solid modeling is taught in connection to concepts of digital thread and design for additive manufacturing. Engineering graphics fundamentals are introduced with the emphasis on a deeper understanding of machinist approach, often used for an easier understanding of Boolean algebra, which is embedded within the Computer Aided Design tools and discusses how the design for additive manufacturing would differ from that approach. Moreover, special attention is given to understanding the …

Stochastic Optimization And Applications With Endogenous Uncertainties Via Discrete Choice Models, Mengnan Chen

Electronic Theses and Dissertations

Stochastic optimization is an optimization method that solves stochastic problems for minimizing or maximizing an objective function when there is randomness in the optimization process. In this dissertation, various stochastic optimization problems from the areas of Manufacturing, Health care, and Information Cascade are investigated in networks systems. These stochastic optimization problems aim to make plan for using existing resources to improve production efficiency, customer satisfaction, and information influence within limitation. Since the strategies are made for future planning, there are environmental uncertainties in the network systems. Sometimes, the environment may be changed due to the action of the decision maker. …

Analysis Of The Integration Of Dfm Techniques And Effective Machining Parameter Selection In Metal Parts Manufacturing, Omar Ahmed Al-Shebeeb

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation investigates the minimization of part design with self-locating features. The research focuses primarily on self-fastening characteristics, standardization of parts, and minimal use of fasteners. Further, the present research studies the design for base parts in the construction of a moving joint system, in order to locate potential part and system design improvements. This process may then be extended to industrial applications in the manufacturing industry. Relatively little work to date has examined the significance of Design for Manufacturing Techniques (DFMT), with their inherent machine element systems and machining parameters to investigate which DFMT has the most influence on …

Energy Efficiency Evaluation Of Blower Heater Non-Purge Compressed Air Dryers, Alexandra M. Botts

Graduate Theses, Dissertations, and Problem Reports (ETD)

There are several compressed air dryers available for industrial use including, refrigerant, desiccant, and membrane. This research focuses on twin tower regenerative closed loop desiccant dryers, specifically: blower heater non-purge (BHNP) with and without cooling water pumps, Compressed-air Heater Purge (CHP), Blower Heater Purge (BHP), and Pressure Swing Heaterless (PSH). These styles of dryers are used mainly in industries that require extremely dry air such as, food manufacturing, medical air, or sensitive technology manufacturers. The research was conducted by collecting and analyzing real time current draw data on air compressors and associated dryers at eight different facilities (13 compressor systems) …

Towards A Framework For Smart Manufacturing Adoption In Small And Medium-Sized Enterprises, Sameer Mittal

Graduate Theses, Dissertations, and Problem Reports (ETD)

Smart Manufacturing (SM) paradigm adoption can scale production with demand without compromising on the time for order fulfillment. A smart manufacturing system (SMS) is vertically and horizontally connected, and thus it can minimize the chances of miscommunication. Employees in an SME are aware of the operational requirements and their responsibilities. The machine schedules are prepared based on the tasks a machine must perform. Predictive maintenance reduces the downtime of machines. Design software optimizes the product design. Production feasibility is checked with the help of simulation. The concepts of product life cycle management are considered for waste reduction. Employee safety, and …

Pharmaceutical Scheduling Using Simulated Annealing And Steepest Descent Method, Bryant Jamison Spencer

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the pharmaceutical manufacturing world, a deadline could be the difference between losing a multimillion-dollar contract or extending it. This, among many other reasons, is why good scheduling methods are vital. This problem report addresses Flexible Flowshop (FF) scheduling using Simulated Annealing (SA) in conjunction with the Steepest Descent heuristic (SD).

FF is a generalized version of the flowshop problem, where each product goes through S number of stages, where each stage has M number of machines. As opposed to a normal flowshop problem, all ‘jobs’ do not have to flow in the same sequence from stage to stage. The …

Can Fitts' Throughput Be A Predictor Of Muscle Fatigue – A Study Based On Metacarpal Gloves?, Sachin Sah

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this study, Fitts’ throughput was used to estimate throughput for metacarpal gloves. Fitts’ throughput combines speed and accuracy during target transfer/movement tasks into a single performance index. It was hypothesized that the throughput will be affected by the glove condition and it will exhibit a relationship with the physiological response of hand muscles and perceived exertions. Fifteen healthy participants (10 males, 5 females) were recruited for data collection. Each participant performed a series of target transfer tasks using four glove conditions: (1) a pigskin leather (glove 1); (2) a synthetic fiber glove (glove 2); (3) a goat-grain leather glove …

Freeform Extrusion Fabrication Of Advanced Ceramics And Ceramic-Based Composites, Wenbin Li

Doctoral Dissertations

"Ceramic On-Demand Extrusion (CODE) is a recently developed freeform extrusion fabrication process for producing dense ceramic components from single and multiple constituents. In this process, aqueous paste of ceramic particles with a very low binder content ( < 1 vol%) is extruded through a moving nozzle to print each layer sequentially. Once one layer is printed, it is surrounded by oil to prevent undesirable water evaporation from the perimeters of the part. The oil level is regulated just below the topmost layer of the part being fabricated. Infrared radiation is then applied to uniformly and partially dry the top layer so that the yield stress of the paste increases to avoid part deformation. By repeating the above steps, the part is printed in a layer-wise fashion, followed by post-processing. Paste extrusion precision of different extrusion mechanisms was compared and analyzed, with an auger extruder determined to be the most suitable paste extruder for the CODE system. A novel fabrication system was developed based on a motion gantry, auger extruders, and peripheral devices. Sample specimens were then produced from 3 mol% yttria stabilized zirconia using this fabrication system, and their properties, including density, flexural strength, Young's modulus, Weibull modulus, fracture toughness, and hardness were measured. The results indicated that superior mechanical properties were achieved by the CODE process among all the additive manufacturing processes. Further development was made on the CODE process to fabricate ceramic components that have external/internal features such as overhangs by using fugitive support material. Finally, ceramic composites with functionally graded materials (FGMs) were fabricated by the CODE process using a dynamic mixing device"--Abstract, page iv.

Quality Function Deployment (Qfd) For Designing Rock Sugar Chopping Machine, Janejira Pannavatkulthon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this research is to study and apply the principles of quality function deployment to design rock sugar chopping machine for selected sugar factory in order to increase productivity of current chopping process. The design of machine is analyzed using House of Quality which is a part of quality function deployment methodology. The data collection was conducted by on-site investigation and face-to-face interview with the owner of sugar factory. It is found that the main problem of this factory is inadequate of in-house production capacity and the bottleneck of manufacturing processes is chopping process. The result of this …

Product Development Of Rice Milk Soap, Jiradej Ekthumrong

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this research is to develop rice into rice milk soap using Quality Function Deployment (QFD) in order to add value to the product. The current rice production process can produce some broken rice, which is of low value. In order to increase value, the study is conducted to develop it into rice milk soap product. Quality Function Deployment is used to analyze and develop the product that best answer customer needs. There are data collection on customers through surveys to gain insights used for product development and rough product to market business plan. The result of this …

Assessing Feasibility Of Water Accounting Toolkit For In A Poultry Processing Plant, Kantinant Silabhusith

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this project, we will be looking into the use of a toolkit called water accounting as applied to a food processing plant and determine its effectiveness as a toolkit for monitoring water usage in a factory. The main objective of this thesis report is to 1. Recommend reducing water consumption by applying the water accounting toolkit. 2. Provide a standardized tool for the case study company to measure their sustainability progress and communicate that information clearly. This report will also discuss the extent in which the company can reduce their water consumption and their various methods in which to …

Decision Support System For Supplier Selection In Gas Pipeline Industry, Kawinkorn Ampornmaha

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this research was to study and analyse both the quantitative and qualitative decision criteria for pipeline fabrication supplier selection in the gas pipeline industry in Rayong, Thailand. The decision-making process was analysed by the Analytic Hierarchy Process technique or AHP and computed using SpiceLogic software. The data collection was carried out by providing questionnaires to experts and specialists at the management level. It was found that the main factors were quality, technical capability, delivery, cost and financial stability. All the main factors were considered with the decision-making process for purchasing and selecting with the best supplier. The …

Tracking System Design For A Production Warehouse Of Automobile Condensers, Kittisak Lertkajornkitti

Chulalongkorn University Theses and Dissertations (Chula ETD)

In order to survive in a harshly competitive market, a company needs to enhance not only its core operational efficiency but also the performance of other business functions, including the supportive ones. As such, in this thesis, we will explore how we could improve the performance of one important supportive operation in a Thai automobile condenser manufacturer, namely the warehousing process, using RFID tracking technology. RFID tracking technology is brought into consideration by the company’s management team due to its current warehousing issues, including inventory mismatch, inventory misplacement, and faulty delivery. We found that the root cause of these problems …

Strategic Supplier Selection:The Case Of International Food Trading Company, Natchanok Paramaporn

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of the research project is to develop strategic supplier selection system for an international food trading company using the Analytic Hierarchy Process (AHP). The products involved are canned food for worldwide export. The decision makers consist of a president and two marketing managers. The chosen decision criteria listed by weight of important are ‘Export Capability’ (54%), ’Pricing Policy’ (28%), ‘Technological Catch-up’ (10%), ‘Ethical Practices’ (5%), and ‘Environmental Management’ (3%). The sub-criteria chosen are ‘Number of Food Safety Certificate’ (54%), ‘Net Selling Price’ (23%), ‘Automation in Production Process’ (8%), ‘Payment Terms’ (5%), ‘Worker’s Safety and Health’ (4%), ‘Adverse Weather …

Improvement Of Inventory Policy For Furniture Fittings Manufacturer, Natchaya Suntipiromkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this research is to improve the management of inventory in a furniture fittings manufacturer so that shortage and overstock could be reduced. Based on our initial investigations, such inventory problems were caused not only by inefficient production planning but also a lack of inventory control system that linked those plans with the stocks of raw material required. To better address the issues, two different models have been therefore proposed, namely more accurate demand forecasting models for products with different demand patterns and inventory control models for raw materials of those products. Regarding the development of more accurate …

Preventive Measures For Project Schedule Control Of Combined Cycle Gas Turbine Power Plant, Pakorn Prabhawong

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this research are to analyse the construction critical paths of the combined cycle gas turbine power plant projects and to determine the delay preventive measures for project schedule control. First, the planned and actual construction schedules of the combined cycle gas turbine power plants have been studied and analysed to see their critical paths and also the near-critical path which could potentially become critical. Construction schedules of four power plants constructed in Thailand have been obtained and analysed. Their capacities and main equipment arrangement are summarized in Chapter 5.1. The common work breakdown structures have been set …

An Implementation Of Stock Allocation Plan Of Retail Store Based On Cluster Analysis, Punnakrit Natekijcharoen

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis presents an implementation of cluster analysis on retail store clustering so that better cluster-based stock allocation plans could be effectively devised and efficiently executed. For the case study company, stock allocation is one of its key strategic decisions as improper stock allocation, especially during special occurrences with high sale volumes, may lead to loss of sales – and so overstocking at some stores/clusters. Based on our initial investigations, we find that the current clustering technique is somewhat inefficient as it simply divides the stores into four groups with equal members based on store’s sales performance. Besides, the coefficient …

Big Data Analytics For Improving Customer Win-Back Rate In Townhome Segment, Warot Lilahajiva

Chulalongkorn University Theses and Dissertations (Chula ETD)

Thailand’s real-estate market is now facing with negative growth, where most developers are encountered with challenges in generating satisfactory revenue, particularly from new customers. In order to improve the revenue stream, customer win-back approach that focuses on current customers in the sales funnel and re-engages them by offering more attractive residential projects is therefore initiated. In particular, we focus on the development of predictive analytics model that potentially increases customer win-back rate by exploring the current databases, identifying significance for win-back (based on past performance), and testing the resulting predictions via several machine learning algorithms. The proposed method returns a …

Reducing The Defects Of A-Pillar Stamping Partin Automotive Assembly Process, Hassakorn Rojpitinithikorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

The goal of this research is to minimize defects in the process of automotive assembly. Regarding the one-year defect and value; the biggest defect cost come from portion of the A-Pillar stamping parts. Therefore, by using Failure Mode and Effect Analysis (FMEA) to examine it and perform experiments using the Design of Experiment (DOE), we investigated the production process as well as figuring out the cause of the problems that happen in the stamping process. The results found that the issue arose from the design of stamping die, which is the risk of springback problems of parts, is not good …