Results 71 to 80 of about 1,881 (223)

THE MIXED UNIVARIATE CONTROL CHART EWMA AND CUSUM FOR FLAVOUR PRODUCTION QUALITY PROCESS MONITORING

open access: yesJurnal Matematika UNAND
A control chart is an important statistical technique used to monitor the average quality of a process or dispersion. Shewhart control chart is used to detect larger disturbances in process parameters.
Surya Puspita Sari   +2 more
doaj   +1 more source

Bayesian monitoring of times between events : the Shewhart tr-chart [PDF]

open access: yes, 2017
The traditional (frequentist) tr -chart is a Shewhart-type chart useful for monitoring times between events (interarrival times) following an exponential distribution.
Kumar, Nirpekshi   +1 more
core  

A Nonparametric Multivariate Control Chart Based on Data Depth [PDF]

open access: yes
For the design of most multivariate control charts, it is assumed that the observations follow a multivariate normal distribution. In practice, this assumption is rarely satisfied.
Weihs, Claus   +2 more
core  

Control Charts for Monitoring Burr Type-X Percentiles [PDF]

open access: yes, 2013
When the sampling distribution of a parameter estimator is unknown, using normality asymptotically, the Shewhart-type chart may provide improper control limits.
Lio, Y. L.; Tsai, Tzong-ru; Aslam, M.; Jiang, Nan   +1 more
core   +1 more source

Measuring variations in healthcare data using run charts and statistical process control charts: a survey of general physicians attending the quality improvement workshop

open access: yesInternal Medicine Journal, Volume 55, Issue 2, Page 308-312, February 2025.
ABSTRACT General physicians as system leaders play a significant role in quality improvement (QI) initiatives within respective health services. However, there are very few formal QI training programmes available for general physicians in Australia. This survey described the experiences of attendees at the 2024 Internal Medicine Society of Australia ...
Ar Kar Aung   +4 more
wiley   +1 more source

PETA KENDALI X DENGAN UKURAN SAMPEL DAN INTERVAL PENGAMBILAN SAMPEL YANG BERVARIASI

open access: yesJurnal Teknik Industri, 2000
Shewhart X chart is widely used in statistical process control for monitoring variable data and has shown good performance in detecting large mean shift but less sensitive in detecting moderate to small process shift.
Tanti Octavia   +2 more
doaj  

Evaluation of the Run-Length Distribution for a Combined Shewhart-EWMA control chart

open access: yes, 2010
A simple algorithm is introduced for computing the run length distribution of a monitoring scheme combining a Shewhart chart with an Exponentially Weighted Moving Average control chart. The algorithm is based on the numerical approximation of
CAPIZZI, GIOVANNA, MASAROTTO, GUIDO
core   +1 more source

Steady-State Run Length Analysis of a Shewhart Quality Control Chart With Supplementary Runs Rules

open access: yes, 1992
Champ and Woodall (1987) introduced a technique for analyzing the run length distribution of a Shewhart control chart with supplementary runs rules. For charting procedures that can be represented as a Markov chain, Crosier (1986) suggested a technique ...
Champ, Charles W.
core   +1 more source

Improving the performance of combined Shewhart-cumulative sum control charts [PDF]

open access: yes, 2013
For an improved monitoring of process parameters, it is generally desirable to have efficient designs of control charting structures. The addition of Shewhart control limits to the cumulative sum (CUSUM) control chart is a simple monitoring scheme ...
Riaz, Muhammad   +2 more
core   +1 more source

A new attribute control chart using multiple dependent state sampling

open access: yes, 2018
This paper proposes a new np control chart by utilizing the information on the past subgroups through the idea of multiple dependent state sampling.
Jun, CH, Aslam, M, Nazir, A
core   +1 more source

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