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Filtering by: Subject Libraries -- Quality control Remove constraint Subject: Libraries -- Quality control Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • An integrated assembly tolerance analysis system

    Creator:
    Qian, Xiaonong
    Abstract:
    Tolerance analysis and synthesis plays a vital role in the success of a product design because it directly affects product quality and manufacturing cost. It also affects manufacturing process selection and planning. This research provides a review of several commonly used assembly tolerance analysis models and evaluation of their limitations....
    Resource Type:
    Masters Thesis

  • Optimal allocation of screening inspection effort for nonserial production systems

    Creator:
    Yum, Bong Jin
    Abstract:
    The economic aspects of quality control have received wide concern since its developmental stages, however, they have not been sufficiently explored. Moreover, as the need for complex products of high precision and reliability increases, most industrial firms have experienced some difficulties in meeting that need at reasonable costs with their...
    Resource Type:
    Masters Thesis
    Full Text:
    McDowell The economic aspects of quality control have received wide con- cern since its developmental

  • A Bayesian analysis for economic design of single sampling plans for a sequence of lots

    Creator:
    Taracena, Fernando L.
    Abstract:
    A dynamic approach to the Bayesian theory of sampling inspection by attributes for the single sampling case is presented. A model is developed which assumes a sequence of lots of equal known size and lots generated by a process operating in a random manner. The model also assumes constant associated...
    Resource Type:
    Dissertation
    Full Text:
    assumes constant associated costs for all lots and that the posterior distribution of the Process quality

  • Diagnostic analysis for mechanical systems

    Creator:
    Henning, Scott A.
    Abstract:
    An analysis and modeling method of the diagnostic characteristics of a mechanical or electromechanical system is presented. Diagnosability analysis is especially relevant given the complexities and functional interdependencies of modern-day systems, since improvements in diagnosability can lead to a reduction of a system's life-cycle costs. The diagnosis process of a...
    Resource Type:
    Masters Thesis
    Full Text:
    multiple functions and are managed by sophisticated computer control systems [Manelski 1998]. While the

  • An integrated assembly tolerance analysis system

    Creator:
    Qian, Xiaonong
    Abstract:
    Tolerance analysis and synthesis plays a vital role in the success of a product design because it directly affects product quality and manufacturing cost. It also affects manufacturing process selection and planning. This research provides a review of several commonly used assembly tolerance analysis models and evaluation of their limitations....
    Resource Type:
    Masters Thesis

  • Comparison of two commercial detector arrays for RapidArc quality assurance

    Creator:
    Asay, Matthew Jamin
    Abstract:
    Radiation therapy is used in approximately half of all cancer treatments. The rapid advances in radiation therapy have led to techniques that are much more complex and therefore must be more carefully assessed for safety and efficacy. Accurate quality assurance methods must be implemented to provide patient safety and confidence...
    Resource Type:
    Masters Thesis
    Full Text:
    : Comparison of Two Commercial Detector Arrays for RapidArc Quality Assurance. Abstract approved

  • A comprehensive evaluation of product quality in the Pacific Whiting (Merluccius productus) and Albacore tuna (thunnus alalunga) industries

    Creator:
    Greene, Elizabeth
    Abstract:
    In the highly competitive animal protein market, seafood faces increasing pressure to improve and standardize product quality. While there is general consensus that quality can be improved for many seafood products, there is little agreement on the types and levels of characteristics that should define "quality." This is a fundamental...
    Resource Type:
    Masters Thesis
    Full Text:
    Evaluation of Product Quality in the Pacific Whiting (Merluccius productus) and Albacore Tuna (Thunnus

  • An economic comparison of X[bar], cumulative sum and geometric moving average control charts for controlling process mean

    Creator:
    Chokethaworn, Nantawong
    Abstract:
    In production processes, there are two types of variations that affect production quality - - variations produced by chance causes and variations produced by assignable causes. One of the main instruments in quality control used to control quality by distinguishing between variations produced by chance causes and a real process...
    Resource Type:
    Masters Thesis
    Full Text:
    quality control used to control quality by distinguishing between variations produced by chance causes

  • Multivariate control charts for nonconformities

    Creator:
    Chattinnawat, Wichai
    Abstract:
    When the nonconformities are independent, a multivariate control chart for nonconformities called a demerit control chart using a distribution approximation technique called an Edgeworth Expansion, is proposed. For a demerit control chart, an exact control limit can be obtained in special cases, but not in general. A proposed demerit control...
    Resource Type:
    Dissertation
    Full Text:
    been addressed in the literature. Pate! (1973) proposed a statistical quality control method for a

  • Probabilistic models for quality control in environmental sensor networks

    Creator:
    Dereszynski, Ethan W.
    Abstract:
    Networks of distributed, remote sensors are providing ecological scientists with a view of our environment that is unprecedented in detail. However, these networks are subject to harsh conditions, which lead to malfunctions in individual sensors and failures in network communications. This behavior manifests as corrupt or missing measurements in the...
    Resource Type:
    Dissertation
    Full Text:
    : Probabilistic Models for Quality Control in Environmental Sensor Networks Abstract approved: Thomas G