Development of SX chart for quality control

This project develops the algorithm and presents the methodology for designing the optimal xbar , SX, and CUSUM charts. The optimal design parameters are obtained by minimizing the loss function. The out-of-control detection effectiveness, as well as performance of the charts, would also be expl...

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Main Author: Ng, Charmaine Xue Ming.
Other Authors: Wu Zhang
Format: Final Year Project
Language:English
Published: 2012
Subjects:
Online Access:http://hdl.handle.net/10356/50028
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-500282023-03-04T18:27:28Z Development of SX chart for quality control Ng, Charmaine Xue Ming. Wu Zhang School of Mechanical and Aerospace Engineering DRNTU::Engineering::Manufacturing::Quality control This project develops the algorithm and presents the methodology for designing the optimal xbar , SX, and CUSUM charts. The optimal design parameters are obtained by minimizing the loss function. The out-of-control detection effectiveness, as well as performance of the charts, would also be explored based on two key measures – the Average Time to Signal (ATS), which is the time taken to signal an out-of-control condition upon its onset, and the loss function. The performance of the charts is compared over a range of process mean shifts, and for three different specified values of minimum allowable ATS0 (average time a false alarm is signalled). The findings from the comparative study revealed that the SX chart largely outperforms the Shewhart xbar chart. Furthermore, while it is nearly as effective as, or slightly inferior to the CUSUM chart in detecting process mean shifts, the SX chart is much simpler in its operation. Bachelor of Engineering (Mechanical Engineering) 2012-05-28T09:06:06Z 2012-05-28T09:06:06Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/50028 en Nanyang Technological University 86 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Manufacturing::Quality control
spellingShingle DRNTU::Engineering::Manufacturing::Quality control
Ng, Charmaine Xue Ming.
Development of SX chart for quality control
description This project develops the algorithm and presents the methodology for designing the optimal xbar , SX, and CUSUM charts. The optimal design parameters are obtained by minimizing the loss function. The out-of-control detection effectiveness, as well as performance of the charts, would also be explored based on two key measures – the Average Time to Signal (ATS), which is the time taken to signal an out-of-control condition upon its onset, and the loss function. The performance of the charts is compared over a range of process mean shifts, and for three different specified values of minimum allowable ATS0 (average time a false alarm is signalled). The findings from the comparative study revealed that the SX chart largely outperforms the Shewhart xbar chart. Furthermore, while it is nearly as effective as, or slightly inferior to the CUSUM chart in detecting process mean shifts, the SX chart is much simpler in its operation.
author2 Wu Zhang
author_facet Wu Zhang
Ng, Charmaine Xue Ming.
format Final Year Project
author Ng, Charmaine Xue Ming.
author_sort Ng, Charmaine Xue Ming.
title Development of SX chart for quality control
title_short Development of SX chart for quality control
title_full Development of SX chart for quality control
title_fullStr Development of SX chart for quality control
title_full_unstemmed Development of SX chart for quality control
title_sort development of sx chart for quality control
publishDate 2012
url http://hdl.handle.net/10356/50028
_version_ 1759858196164378624