Browsing Mathematics, Statistics & Physics by Author "Mahmood, Tahir"

Now showing items 1-6 of 6

    • An Improved Control Chart for Monitoring Linear Profiles and its Application in Thermal Conductivity 

      Riaz, Muhammad; Saeed, Usman; Mahmood, Tahir; Abbas, Nasir; Abbasi, Saddam Akber ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)
      In most of the manufacturing processes, we encounter different quality characteristics of a product and process. These characteristics can be categorized into two kinds; study variables (variable of interest) and the ...

    • Efficient GLM-based control charts for Poisson processes 

      Mahmood, Tahir; Iqbal, Anam; Abbasi, Saddam Akber; Amin, Muhammad ( John Wiley & Sons, Ltd , 2022 , Article)
      The control charts are essential instruments that can impart crucial insights to quality controllers for maintaining the productivity of manufacturing processes. The conventional charting designs are based on a single study ...

    • Efficient monitoring of coefficient of variation with an application to chemical reactor process 

      Mahmood, Tahir; Abbasi, Saddam Akber ( John Wiley and Sons Ltd , 2021 , Article)
      Control chart is a useful tool to monitor the performance of the industrial or production processes. Control charts are mostly adopted to detect unfavorable variations in process location (mean) and dispersion (standard ...

    • Linear profile monitoring using EWMA structure under ranked set schemes 

      Riaz, Muhammad; Mahmood, Tahir; Abbasi, Saddam Akber; Abbas, Nasir; Ahmad, Shabbir ( Springer London , 2017 , Article)
      In many manufacturing processes, study variable is not the only quality characteristic, but there may exist some explanatory variable(s) that are associated with the study variable. This association may be linear or nonlinear ...

    • Multivariate Mixed EWMA-CUSUM Control Chart for Monitoring the Process Variance-Covariance Matrix 

      Muhammad; Ajadi, Jimoh Olawale; Mahmood, Tahir; Abbasi, Saddam Akber ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)
      The dispersion control charts monitor the variability of a process that may increase or decrease. An increase in dispersion parameter implies deterioration in the process for an assignable cause, while a decrease in ...

    • Online monitoring of climatic parameters: a statistical study about environmental changes in Qatar 

      Mahmood, Tahir; Abbasi, Saddam Akber; Riaz, Muhammad ( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)
      Twentieth century has witnessed unprecedented changes in the climate whose profound effects are also observed on ecosystem and human life. The source of these changes are presumed to be increasing concentration of greenhouse ...