I-MR Chart Analysis for Process Performance Monitoring PPT

This PPT slide, part of the 138-slide Six Sigma - Statistical Process Control (SPC) PowerPoint presentation, presents an I-MR chart example, which is a tool used in statistical process control to monitor process performance over time. The chart is divided into 2 sections: the I-chart and the MR chart. The I-chart tracks individual measurements, while the MR chart monitors the moving range of those measurements.

In the first section, the text highlights that the process performance data reveals one special cause affecting the process. This special cause is also reflected in the MR chart, which leads to an increase in the average moving range (MR). Consequently, this affects the short-term standard deviation, which is crucial for calculating the control limits for the I-chart. The control limits are indicated as UCL (Upper Control Limit) and LCL (Lower Control Limit), with specific values provided (UCL = 5.72, LCL = 3.05).

The second section emphasizes the need to exclude special causes that appear in the MR chart to ensure that all special causes can be accurately identified in the I-chart. This distinction is critical for maintaining the integrity of the data analysis. The MR chart also has its own control limits (UCL = 7.42, MR = 2.27), which are essential for understanding the variability in the process.

Overall, this slide serves as a practical illustration of how to interpret I-MR charts, highlighting the importance of distinguishing between common and special causes in process monitoring. Understanding these concepts is vital for any organization aiming to enhance process quality and operational efficiency.

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Six Sigma Project Statistical Process Control Six Sigma Data Analysis