Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"statistical quality control"”.
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Statistical Quality Control Algorithm for In Situ Sea Surface Temperatures
… and operational oceanography. However, the quality of these observations varies significantly across platforms, time, and location, leading to frequent anomalies and outliers. NOAA’s operational quality control (QC) system, iQuam v2.10, provides a baseline method for flagging questionable …
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Statistical quality control techniques using multilevel discrete product quality measures
Statistical quality control is the application of statistical methods to problems for which it is of interest to evaluate, establish, or verify the quality of a product. The two basic areas of statistical quality control that have received both the greatest attention in the literature and the …
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The application of statistical quality control to the casting of tractor transmission cases
… advantages to be claimed from the use of statistical quality control in the foundry industry.
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A study of human measurement error in a controlled experiment for micrometer measurements
… isolated, with respect to its effect of biasing statistical quality control tests that describe a manufacturing process. The author of this report designed a specialized measurement jig that was used to isolate human measurement error. Specifically, the tests involved seven human inspectors …
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Interval-valued Uncertainty Capability Indices with South African Industrial Applications
Since the advent of statistical quality control and process capability analysis, its study and application has gained tremendous attention both in academia and industry. This attention is due to its ability to describe the capability of a complex process adequately, simply (i.e. using a unitless …
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On monitoring the attributes of a process
Two prominent monitoring procedures in statistical quality control are the p-chart for the proportion of items defective, and the c-chart, for the number of defects per item. These procedures are reconsidered, and some extensions are examined for monitoring processes with multiple attributes. Some …
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Inter-laboratory variability of the Marshall test method for asphalt concrete
Statistical quality control measures, such as used by the West Virginia Division of Highways (WVDOH), require quantification of the variability of the test methods to set meaningful material acceptance parameters. The Division currently uses the Marshall method for asphalt concrete mix design and …
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A Multivariate Quality Control Approach for Automated Manufacturing Systems
… environment, effective and practical statistical quality control approaches are essential. A successful process control approach needs to provide on line real time monitoring of quality related characteristics.</p> <p>No longer acceptable is an approach that analyzes quality related …
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A comparison of a supplementary sample non-parametric empirical Bayes estimator with the classical estimator in a quality control situation
… empirical Bayes estimator in detecting an out-of-control situation arising in statistical quality control work. The investigation was accomplished through Monte Carlo simulation on the IBM-7040/1401 system at the Virginia Polytechnic Institute Computing Center, Blacksburg, Virginia. In most cases …
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Application of quality control and other statistical methods to the precision wood industry
Investigations were conducted of the statistical aspects of basic research, engineering development, and economic problems pertinent to the Lane Company, Altavista, Virginia, cedar chest manufacturer. Estimations were made of the quality level and variability of various manufacturing operations, …
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Buildings and corporate strategy : towards a management system model
… Drawing upon work in environment-behavior. statistical quality control and decision support systems (DSS), it defines an integrated model of a management system for building- related activities. Examples of the use of the DSS are given. The fourth and final part takes a look back at the …
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A model for performance management in real properties using statistical techniques
… this direction is realized by the application of Statistical Quality Control (SQC), a technique used for monitoring quality in industrial products. This thesis presents a framework for performance control of real property portfolio, based on the principle and practice of SQC. The model has three …
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Capability of Foundry Processes
… degree, been slow in accepting and implementing statistical principles in an overall program designed to improve the efficiency of the enterprise and its included functions. Where statistical principles are used, they are for the most part limited to purely mechanical functions involving specific …
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Quality by design for the downstream processing of biopharmaceuticals
This thesis explores the concept of “Quality by Design” (QbD) as proposed by the FDA and demonstrates how this concept can be used and applied to the manufacture of biopharmaceutical proteins. QbD principles and approaches have been adopted in carrying out the development of unit operations that …
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Process Monitoring with Multivariate Data:Varying Sample Sizes and Linear Profiles
Multivariate control charts are used to monitor a process when more than one quality variable associated with the process is being observed. The multivariate exponentially weighted moving average (MEWMA) control chart is one of the most commonly recommended tools for multivariate process …
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New progress in hot-spots detection, partial-differential-equation-based model identification and statistical computation
… time. To realize this objective, we propose a statistical method to under the framework of tensor decomposition and our method has three steps. First, we fit the observed data into a Smooth Sparse Decomposition Tensor (SSD-Tensor) model that serves as a dimension reduction and de-noising …