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  • 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:
    FIGURES Figure Production Process and Quality Control Page 1.1 2 1.2 A Basic Control Chart 4 2.1 5

  • Economically optimal control charts for two stage sampling

    Creator:
    Hall, Kathryn B.
    Abstract:
    Control charts are designed to monitor population parameters. Selection of a control chart sampling plan involves determination of the frequency of samples, size of each sample, and critical values to determine when the system is sending an out-of-control signal. Since the main use of control charts is in industry, a...
    Resource Type:
    Dissertation
    Full Text:
    parameters. Selection of a control chart sampling plan involves determination of the frequency of samples

  • 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:
    are independent, a multivariate control chart for nonconformities called a demerit control chart