Results 71 to 80 of about 6,536 (217)
Waiting Time Control Chart for M/G/1 Retrial Queue
ComputationRetrial queues are used extensively to model many practical problems in service systems, call centers, data centers, and computer network systems. The average waiting time is the main observable characteristic of the retrial queues. Long queues may cause
Yih-Bey Lin +3 more
doaj +1 more source
Construction of Control Charts Based On Six Sigma Initiatives for the Number of Defects and Average Number of Defects per Unit [PDF]
, 2011 A control chart is a statistical device used for the study and control of a repetitive process. In 1931, Shewart suggested control charts based on 3 sigma limits.
Balamurugan, P., Radhakrishnan, R.
core +2 more sources
A Spatiotemporal Scheme for Process Control Using Image Analysis of Speckle Patterns
Quality and Reliability Engineering International, Volume 41, Issue 5, Page 1773-1788, July 2025.ABSTRACT Conventional image‐based process control schemes require distinct, detectable features (e.g., edges or textures). In the absence of such features, current methods fail or require additional preprocessing. They are also prone to false detections from random noise, dirt, or scratches on the surface.
Hamed Sabahno, Davood Khodadad
wiley +1 more source
Evaluation of the Run-Length Distribution for a Combined Shewhart-EWMA Control Chart [PDF]
, 2007 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.
Capizzi, Giovanna, Masarotto, Guido
core +1 more source
European Journal of Soil Science, Volume 76, Issue 3, May–June 2025.ABSTRACT Sustainable soil management is recognised as a pivotal solution for addressing current and future global challenges, but existing global and national soil property maps often lack the fine‐scale resolution required for local or intra‐field assessments.
Lucas Carvalho Gomes +13 more
wiley +1 more source
A New Dispersion Control Chart for Handling the Neutrosophic Data
IEEE Access, 2020 The control chart based on mean deviation (MD ) is customary used as a robust alternative to the existing Shewhart control charts for observing changes in dispersion parameter of the process.
Zahid Khan +4 more
doaj +1 more source
Control Charts for the Lognormal Distribution [PDF]
Control Charts are the main tools of Statistical Process Control. They are used for deciding whether a process is statistically stable or not. Much theory and many applications have been developed for the Gaussian (Normal) distribution in this area ...
Maravelakis, Petros +2 more
core +1 more source
A new procedure for monitoring the range and standard deviation of a quality characteristic [PDF]
The Shewhart and the Bonferroni-adjustment R and S chart are usually applied to monitor the range and the standard deviation of a quality characteristic. These charts are used to recognize the process variability of a quality characteristic.
Kiani, Mehdi +2 more
core +1 more source
Complete blood count: absolute or relative values? [PDF]
, 2016 Background: For many years, relative values based on 100 quantified cells have been used to assess blood counts in the field of hematology. However, modern blood counting machines have recently made it possible to determine absolute counts.
Arneth, Borros
core +1 more source
Outliers Detection Models in Shewhart Control Charts
Mathematics, 2020 Shewhart control charts with estimated control limits are widely used in practice. However, the estimated control limits are often affected by phase-I estimation errors.
Raji, Ishaq Adeyanju +4 more
openaire +1 more source