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Advanced Search Results For "QUALITY control charts"

1 - 10 of 7,788 results for
 "QUALITY control charts"
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Time to signal distribution of multivariate bayesian control chart with dual sampling scheme.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Oct2022, Vol. 60 Issue 20, p6124-6147. 24p. 16 Charts, 3 Graphs.

Abstract: The ability of a control chart to detect a shift in the process can be determined by the average run length (ARL), a widely used performance indicator for single sampling interval (SSI) control charts. When it comes to variable sampling interval (VSI) ...

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An alternative expression for the constant c4[n] with desirable properties.

Publication Type: Academic Journal

Source(s): Scientia Iranica. Transaction E, Industrial Engineering. Nov/Dec2022, Vol. 29 Issue 6, p3388-3393. 6p.

Abstract: The constant c4[n] is commonly used in the construction of control charts and the estimation of process capability indices, where n denotes the sample size. Assuming normal distribution, the unbiased estimator of the population standard deviation is ob...

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A nonparametric CUSUM scheme for monitoring multivariate time-between-events-and-amplitude data with application to automobile painting.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Sep2022, Vol. 60 Issue 18, p5432-5449. 18p. 4 Diagrams, 9 Charts, 2 Graphs.

Abstract: Monitoring time-between-events-and-amplitude (TBEA) data, including the time interval between two successive nonconforming events and the amplitude of an event, is significant in many applications, especially manufacturing and service operations. Almos...

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Robust monitoring of stochastic textured surfaces.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Aug2022, Vol. 60 Issue 16, p5071-5086. 16p.

Abstract: Stochastic textured surfaces (STSs) do not have well-defined features, and their quality characteristics are reflected through the stochastic nature of their surface textures. Monitoring general global changes in the stochastic nature of STSs is a rela...

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Revised triple sampling control charts for the mean with known and estimated process parameters.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Aug2022, Vol. 60 Issue 16, p4911-4935. 25p. 3 Diagrams, 11 Charts, 1 Graph.

Abstract: The primary aim of this research is to propose a revised triple sampling (TS) X ¯ chart, where the derivations of new formulae for computing the average run length of the triple sampling (TS) X ¯ chart correctly are provided. The secondary aim is to de...

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Applying SVSSI sampling scheme to np-chart to decrease the time of detecting shifts using Markov chain approach and Monte Carlo simulation.

Publication Type: Academic Journal

Source(s): Scientia Iranica. Transaction E, Industrial Engineering. Nov/Dec2022, Vol. 29 Issue 6, p3369-3387. 19p.

Abstract: One of the main criteria for judging the power of control charts is their ability to perform fast detection of deviations and shifts in the process. Average Time to Signal (ATS) and Adjusted Average Time to Signal (AATS) are among such criteria calcula...

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Memory-Type Control Charts Through the Lens of Cost Parameters.

Publication Type: Academic Journal

Source(s): Intelligent Automation & Soft Computing. 2023, Vol. 36 Issue 1, p1-10. 10p.

Abstract: A memory-type control chart utilizes previous information for chart construction. An example of a memory-type chart is an exponentially-weighted moving average (EWMA) control chart. The EWMA control chart is well-known and widely employed by practition...

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A New Modified EWMA Control Chart for Monitoring Processes Involving Autocorrelated Data.

Publication Type: Academic Journal

Source(s): Intelligent Automation & Soft Computing. 2023, Vol. 36 Issue 1, p281-298. 18p.

Abstract: Control charts are one of the tools in statistical process control widely used for monitoring, measuring, controlling, improving the quality, and detecting problems in processes in various fields. The average run length (ARL) can be used to determine t...

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Reduction of non-conforming through statistical process control charts in textile industry.

Publication Type: Academic Journal

Source(s): Industria Textila. 2022, Vol. 73 Issue 5, p537-543. 7p.

Abstract: Industria textilă din Pakistan este un sector în continuă dezvoltare, care contribuie cu o cotă importantă în economie. Exporturile din Pakistan depind în mare măsură de produsele textile. Un defect minor al bunului finit poate cauza pierderi majore al...

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Using the Laney p' Control Chart for Monitoring COVID-19 Cases in Jordan.

Publication Type: Academic Journal

Source(s): Journal of Healthcare Engineering. 9/19/2022, Vol. 2022, p1-18. 18p.

Authors:

Abstract: In this research, we examine the use of the Laney p' control chart and the application of test rules to assess governmental interventions throughout the COVID-19 pandemic and understand how certain activities and events that took place affected the inf...

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