Comprehensive review of high-dimensional monitoring methods: trends, insights, and interconnections

F Ahmed, T Mahmood, M Riaz… - Quality Technology & …, 2024 - Taylor & Francis
High-dimensional data refers to a dataset that contains many variables or features, typically
with many more features p than observations n (ie n< p). With technological advancements …

Integration of hybrid score functions to design new adaptive EWMA control chart to monitor the process mean shift

B Zaman, SZ Mahfooz, N Khan, M Riaz… - Computers & Industrial …, 2023 - Elsevier
Small-to-moderate shifts in the process parameters can be detected using the traditional
Exponentially Weighted Moving Average (EWMA) control chart. The classical EWMA control …

High-dimensional control charts with application to surveillance of grease damage in bearings of wind turbines

T Mahmood, F Ahmed, M Riaz… - … & Manufacturing Research, 2024 - Taylor & Francis
High-dimensional data, characterized by having more attributes or variables than
observations, presents unique challenges in industrial operations surveillance. Traditional …

Enhanced dispersion monitoring structures based on modified successive sampling: Application to fertilizer production process

M Hyder, SMM Raza, T Mahmood, N Abbas - Symmetry, 2023 - mdpi.com
In this era of Industry 4.0, efficient and affordable monitoring solutions are needed for the
surveillance of manufacturing/service operations. In general, memory-type control charts …

Robust Shewhart-CUSUM design for monitoring process mean using repetitive sampling

Y Mahmood, MBC Khoo, SY Teh, MH Lee - Computers & Industrial …, 2023 - Elsevier
The present study initiates the use of repetitive sampling (RS) for CUSUM type statistics
discussed by Riaz et al.(2017) and couples it with the Shewhart chart (termed as RS-SEC …

[HTML][HTML] Generalized linear modelling based monitoring methods for air quality surveillance

T Mahmood - Journal of King Saud University-Science, 2024 - Elsevier
Rising industrial pollution, exacerbated by climate change, underscores the need for
effective environmental monitoring. Leveraging sensor advancements and Birnbaum …

A bivariate CUSUM control chart based on exceedance statistics

A Erem, T Mahmood - Quality and Reliability Engineering …, 2023 - Wiley Online Library
In manufacturing systems, statistical process control (SPC) is used to detect unusual
observations in the process. Most control charts are composed based on the normality …

Shewhart-EWMA chart for monitoring binomial data subject to shifts of random amounts

S Haridy, JC Benneyan - Computers & Industrial Engineering, 2024 - Elsevier
Attribute charts are used widely for monitoring binary events in manufacturing, service, and
healthcare processes. While Shewhart type charts are efficacious in detecting large or …

Optimal precedence tests under single and double-sampling framework

N Chakraborty, N Balakrishnan, M Finkelstein - Journal of Computational …, 2024 - Elsevier
The precedence test is a nonparametric, two-sample test for stochastic comparison of
lifetime data. The power of the precedence test increases with increasing sample size …

On moving average based location charts under modified successive sampling

T Mahmood, M Hyder, SMM Raza… - Hacettepe Journal of …, 2024 - dergipark.org.tr
Ceramics are made up of water, clay, and powders. These are categorized as non-metallic
and inorganic materials. It is revealed in the literature that Longquan celadon glaze had …