Browsing Natural and Agricultural Sciences by UP Author "Chakraborti, Subhabrata"

Browsing Natural and Agricultural Sciences by UP Author "Chakraborti, Subhabrata"

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  • Bayesian monitoring of times between events : the Shewhart tr-chart 
    Kumar, Nirpekshi; Chakraborti, Subhabrata (Asqc American Society for Quality Control, 2017-04)
    The traditional (frequentist) tr -chart is a Shewhart-type chart useful for monitoring times between events (interarrival times) following an exponential distribution. This problem often arises in high-yield processes where ...
  • Design and implementation of CUSUM exceedance control charts for unknown location 
    Graham, Marien Alet; Chakraborti, Subhabrata; Mukherjee, Amitava (Taylor & Francis, 2014-09)
    Nonparametric control charts provide a robust alternative in practice when the form of the underlying distribution is unknown. Nonparametric CUSUM (NPCUSUM) charts blend the advantages of a CUSUM with that of a nonparametric ...
  • Distribution-free exceedance CUSUM control charts for location 
    Mukherjee, A.; Graham, Marien Alet; Chakraborti, Subhabrata (Taylor & Francis, 2013)
    Distribution-free (nonparametric) control charts can be useful to the quality practitioner when the underlying distribution is not known. A Phase II nonparametric CUSUM chart based on the exceedance statistics, called ...
  • A generally weighted moving average signed-rank control chart 
    Chakraborty, Niladri; Chakraborti, Subhabrata; Human, Schalk William; Balakrishnan, N. (Wiley, 2016-12)
    The idea of process monitoring emerged so as to preserve and improve the quality of a manufacturing process. In this regard, control charts are widely accepted tools in the manufacturing sector for monitoring the quality ...
  • Improved Shewhart-type runs-rules nonparametric sign charts 
    Kritzinger, Pierre; Human, Schalk William; Chakraborti, Subhabrata (Taylor & Francis, 2014-07)
    Runs-rules are typically incorporated in control charts to increase their sensitivity to detect small process shifts. However, a drawback of this approach is that runs-rules charts are unable to detect large shifts quickly. ...
  • Nonparametric signed‐rank control charts with variable sampling intervals 
    Coelho, M.L.I.; Graham, Marien Alet; Chakraborti, Subhabrata (Wiley, 2017-12)
    Variable sampling interval (VSI) charts have been proposed in the literature for normal theory (parametric) control charts and are known to provide performance enhancements. In the VSI setting, the time between monitored ...
  • An overview of synthetic-type control charts : techniques and methodology 
    Rakitzis, Athanasios C.; Chakraborti, Subhabrata; Shongwe, Sandile Charles; Graham, Marien Alet; Khoo, Michael Boon Chong (Wiley, 2019-11)
    In this paper, we provide an overview of a class of control charts called the synthetic charts. Synthetic charts are a combination of a traditional chart (such as a Shewhart, CUSUM, or EWMA chart) and a conforming run‐length ...
  • Properties and performance of the c-chart for attributes data 
    Chakraborti, Subhabrata; Human, Schalk William (Taylor & Francis, 2008)
    The effects of parameter estimation are examined for the well-known c-chart for attributes data. The exact run length distribution is obtained for Phase II applications, when the true average number of non-conformities, ...