However, there is a lack of applicable methodology that shows how to implement failure analysis in the early design phase to achieve a robust design. Collective case study design 14 provides a structure to gain insight into the issue of interest across settings as it allows comparison within and between cases 15. In a descriptive design, a researcher is solely interested in describing the situation or case under their research study. Three approaches to case study methods in education. The optimum design achieved 2 db improvement in sn ratio that amounted to 37% reduction in ber.
This article seeks to illustrate how already simple analyses and early stage design methods can help to better understand. Pdf robust design has been developed with the expectation that an insensitive design can be obtained. This customization allows the whirlpool team to employ simulation to shorten design time, standardize processes and provide consistent and reliable results regardless of the analysts skill set. Robust design for quality engineering and six sigma. P4 final design design identify phase p1 customer requirements strategic intent p2 conceptual design p3 preliminary design dfss design teams apply advanced design methods and tools throughout the phases of a rigorous product, service, or process design roadmap to ensures proper design discipline and superior results. Genichi taguchi, greatly improves engineering productivity. Kano integrated robust design approach for aesthetical product design. The aim of a parameter design experiment is to identify and design the settings of the process parameters. In this study author has taken four factors each at three.
The application of the approach is investigated in an actual case study where real data is utilized to design a bread supply chain network. Case study considering design of a pressure container, according to mechanics of materials, the pressure containers axial. Nov 14, 20 the transfer function and the expected variation in the technical parameters can then be combined to make a prediction of the variation that we should expect in the ctq. While a systematic quality strategy is of crucial importance for the success of manufacturing companies, the universal applicability and effectiveness of implemented quality management practices were called into question by a number of major product recalls in recent years. Hada assistant professor, scoe, kharghar, india abstract. Robust design taguchi method case studies isixsigma. The recess exceeded the total length of commercially available grease fittings, and the legacy design was complicated to users. Worlds best practices for developing winning vehicles is a musthave book for engineers and managers who are working on design, product, manufacturing, mechanical, electrical, process, quality area. Case study research design how to conduct a case study. The two techniques are response surface modeling and multiresponse. This book is written primarily for engineers and researchers who use statistical robust design for quality engineering and six sigma, and for statisticians who wish to know about the wide range of applications of experimental design in industry. Robust product design is a concept from the teachings of dr. Case study for robust design and tolerance analysis.
A monte carlo based robustness optimization method in. Introducing robust design in product development learning. The aim of this study is to design process optimization for chemical process through robust taguchi design to identify the best parameter setting for purity maximization of chemical x. See figure 1 for a pictorial representation of a case control study design. This case study illustrates the use of the taguchi method to develop a communication receiver product. Barriers to the reuse of inspection data case study in. Application case studies on taguchi design of experiments, product and process design improvements, qualitek4 software and textbook, analysis of variance, learning doe for immediate application, handson experiment design and analysis experience, dynamic characteristic analysis. Besides discussing case study design, data collection, and analysis, the refresher addresses several key features of case study research. Robust design and planning of microalgae biomasstobiodiesel. The transfer function and the expected variation in the technical parameters can then be combined to make a prediction of the variation that we should expect in the ctq. Case study research has grown in reputation as an effective methodology to investigate and understand complex issues in real world settings.
Application case studies on taguchi design of experiments. In addition, the case study offers an alternative and effective approach to develop a robust system within design and development environment. Robust design of water distribution networks for a proactive risk and uncertainty management doctoral thesis in civil engineering, with specialization in hydraulics, water resources and environment. Optimization of kanban systems using robust parameter design. Service quality robust design with a case study in airport services article in international journal of productivity and quality management 93. As a system becomes more complex, the uncertainty in the operating conditions increases. A case study approach was used to investigate the application of the rd. Request pdf robust design in the case of data contamination and model departure in robust design, it is usually assumed that the experimental data are normally distributed and uncontaminated. Kano integrated robust design approach for aesthetical. It is defined as reducing variation in a product without eliminating the causes of the variation. Previous studies have performed deterministic optimization followed by robustness assessments 2. The applicability of the proposed framework is demonstrated through a case study considering different uncertainty settings. Case cohort design is another option with appropriate sampling and analysis, the hr estimates the hr in the full cohort in a case cohort study you can also estimate e. By consciously considering the noise factors environmental variation during the products usage, manufacturing variation, and component deterioration and the cost of failure in the field the robust design method helps ensure customer satisfaction.
Robust design a case study in a research and development company. Researchers can adopt either a single case or multiple case design depending on the issue in question. Chapter 3 research design, research method and population 3. During the 1980s, many companies finally realized that the old methods for ensuring quality were not competitive with the japanese methods. Robust design in the case of data contamination and model. Robust design methodology for reliability wiley online books. Consumers require highperforming products at the right price. The following case study is taken from the taguchi approach to parameter design, by. An rct is a study design that is generally used in experi. Robust product design is important for companies because it reduces costs, and improves quality and customer satisfaction. More comprehensive product design more robust product. The main outcome measure in case control studies is odds ratio or.
In this design, participants are selected for the study based on their outcome status. A case study in automobile industry 1jalal khan, 2s. Aside from showing your experience and skill, case studies give your potential client or employer an idea of how you work and think. Case study designs have been used across a number of disciplines, particularly the social sciences, education, business, law, and health, to address a wide range of research questions. How to write project case studies for your portfolio. A case study robust design is the process of minimising variability of products and processes in order to improve their quality and reliability. In the design of a case study, it is important to plan and design how you are going to address the study and make sure that all collected data is relevant. Casecohort design is another option with appropriate sampling and analysis, the hr estimates the hr in the full cohort in a casecohort study you can also estimate e. Aug 21, 2009 robust design methodology for reliability provides a starting point for new thinking in practical reliability improvement work that will appeal to advanced designers and reliability specialists in academia and industry including fatigue engineers, product development and process quality professionals, especially those interested in and or. What is the form of my question who, what, where, why, or how.
In this context, kanban can be classified as a tool that assists in the proper sizing of inventory levels and production. Voice interfaces, image search, alexa and other crazy things that are rocking our world. Both linear and nonlinear analysis must be used to support the tool design process. Service quality robust design with a case study in airport services. Dec 14, 2019 the current competitive market demands that manufacturing companies have a survival strategy which should totally focus on providing highquality products, being consistent in the level of service provided, having lower inventory levels and higher flexibility in operations. Robust statistics represent an alternative approach to parameter estimation, differing from nonrobust statistics sometimes called classical statistics in the degree to which they are affected by violations of model assumptions.
The results show that the proposed model outperforms the traditional supply chain design models in terms of solution robustness and computational time. Technology transfer and pharmaceutical quality systems. Case study for robust design and tolerance analysis pdf. Robust design is the process of minimising variability of products and processes in order to improve their quality and reliability. However, this study presents the first hyperstudy applications of simultaneous robust optimization. Robust design a case study in a research and development.
Utilising a collective case study system theory mixed. Request pdf service quality robust design with a case study in airport services this paper shows how the taguchis robust design can be developed to. First, an abbreviated definition of a case study will help identify the circumstances when you might choose to use the case study method instead of or as a complement to some other research method. Window system case study conclusions cross functional team included design, manufacture, reliability, and suppliers. Thus, some participants have the outcome of interest referred to as cases, whereas others do not have the outcome of interest referred to as controls. A case study has been presented to evolve a profile of a car. First, this hierarchy of evidence is a general guideline, not an absolute rule. A case study on one or two specific countries becomes a powerful and focused tool for determining the social and economic pressures driving this.
In section 5 we discuss the challenges for robust design in the study of multidisciplinary systems and in section 6 we expand the discussion to the challenges of robust design in multiscale systems. In such a system, implementing a precise failure analysis in early design stage is vital. Whereas nonrobust statistics are greatly affected by small violations of their underlying assumptions, robust. This study showed the efficacy of optimization between two different techniques for the baking of fermented chickpea flour. A case study is a story about something unique, special, or interestingstories can be about individuals, organizations, processes, programs, neighborhoods, institutions, and even events.
Robust design the background robust design is a method for improving the quality of products and. Merriams qualitative research and case study applications in education1998, and robert e. Overall study is therefore regarded as more robust. Stake refers to the study of more than one case as collective case studies, each of which is an instrumental study linked by coordination between individual studies. Distribution unlimited the views expressed in this case study. Hence, the research design used for this research work is exploratory research for identification of variables followed by descriptive research design single cross sectional design for sampling and data collection. Result from the case study suggested that top management commitment is the key success factor for the implementation of robust design in research and development firm. Simultaneous robust and design optimization process 1. Kodaks copy machine manufacturing division was faced with improving the reliability of its paper feeder from mean time. What is robust product design iowa state university. Analysis of case control studies the odds ratio or is used in case control studies to estimate the strength of the association between exposure and outcome. Thus, some participants have the outcome of interest referred to as cases, whereas others do not have. Numerical results obtained from model implementation and sensitivity analysis experiments arrive at important managerial insights and practical implications. Robust design method, also called the taguchi method, pioneered by dr.
Kodaks copy machine manufacturing division was faced with improving the reliability of its paper feeder from mean time between failures of 2500 sheets to 40,000 sheets. The optimum setting of parameter is to be obtained in presence of uncontrollable noise factors. Robust design is implemented in a gear hobbing process. Analysis of a robust qualitative research methodology abstract a unique multipart qualitative study methodology is presented from a study which tracked the transformative journeys of four careerchanging women from stem fields into secondary education. Enabling reuse of inspection data to support robust design. Request pdf reduction of cost of quality by using robust design. In recent years, it has seen wide spread application in many fields such as mechanical j quality technol 24 1992 22, chemical quality engng 9 1997 391 and civil quality engng 9 1997 441 engineering. Robust design is an engineering methodology for improving productivity during research and development so that highquality products can be produced quickly and at low cost phadke, 1989. Service quality robust design with a case study in.
The four case studies produced in this series are the c5 galaxy, the f111, the hubble space telescope, and the theater battle management core system. Pdf failure analysis in conceptual phase toward a robust. Design of case study since case study method receives criticism in terms of its lack of robustness as a research tool, crafting the design of case studies is of paramount importance. There certainly are cases where a study that used a relatively weak design can trump a study that used a more robust design ill discuss some of these instances in the post, and there is no one. Quality control, robust design, and the taguchi method. Note that it is not possible to estimate the incidence of disease from a case control study unless the study is population based and all cases in a defined population are obtained. Robust design, variation simulation, virtual verification and root causes analysis are activities that. Study of an advanced topic in robust design other possibilities with permission 16.
A monte carlo based robustness optimization method in new. This can suggest associations between the risk factor and development of the disease in question, although no definitive causality can be drawn. Case studies are basically the whole point of building a portfolio which is why semplice my company was built around just that. Distribution unlimited the views expressed in this case study are those of the authors and do not reflect the. The initiative includes three pilot cases within the product development organization. Role of design for six sigma in total product development. Observational case control or cohort studies may suggest the bene.
This allows a researcher to provide insights into the why and how of research. Often these studies are the only practicable method of studying various problems, for example. An agricultural equipment company was using tube connectors, tubing, and a grease fitting to provide a service location to a recessed bearing. It is a theorybased design method which is created by gathering, analyzing, and presenting collected data. Before i begin, i want to make a few clarifications. Generalizing from case study to theory the appropriately developed theory is also at the level at which generalization of the case study results will occur theory for case studies is characterized as analytic generalization and is contrasted with another way of generalizing results known as statistical generalization. In this study author has taken four factors each at three levels with a nuisance factor with three levels, for maximization of purity percentage at. Case studies are used in many professional education programs, primarily in business school, to present realworld situations to students and to assess their ability to parse out the important aspects of a. Case studies do not have set elements that need to be included. Case control study design is a type of observational study. Reduction of cost of quality by using robust design. Especially with more complex work such as ux design, a case study is a must to.