Sturdy Control Charts for Time Series Data   

Document Type : Original Article

Authors

1 Profesor, Department of Statistics, Allameh Tabatabaʼi University, Tehran, Iran. M.Sc., Department of Statistics, Alborz University, Qazvin, Qazvin, Iran   

2 Profesor, Department of Statistics, Allameh Tabatabaʼi University, Tehran, Iran. 

Abstract
Any statistical method designed to detect process changes over time is within the scope of statistical process control. Among the most widely used tools for statistical process control, the control chart is the most important and powerful tool for statistical process control. Here it is important to understand that statistical process control charts are not complete in relation to process control in two respects. They do not have non-random causes and their elimination. In this paper, we introduce robust control diagrams for time-series data to detect reasoned deviations. We collect daily diagrams and draw solid control charts and standard control charts for time series data. Statistical analysis of this design was performed using SPSS16 software and finally by comparing Solid control diagram With standard control diagram for time series data, we conclude that the stable control diagram has a better performance than the standard control diagram. 

Keywords


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