How to interpret a run chart?

A run chart is a graph that displays data over time to identify trends and patterns.

To interpret a run chart, first identify the time period represented on the x-axis and the variable being measured on the y-axis. Look for any patterns or trends in the data, such as an increase or decrease over time, or any sudden changes or outliers.

Next, calculate the mean and standard deviation of the data to determine if there are any significant changes or shifts in the data. If the data is normally distributed, use the control limits formula to calculate the upper and lower control limits. Any data points outside of these limits may indicate a special cause variation.

It is also important to consider any external factors that may have influenced the data, such as changes in the environment or processes. If there are any suspected causes for the patterns or trends observed, investigate further to determine if any corrective actions are necessary.

Overall, a run chart can provide valuable insights into the performance of a process over time and can help identify areas for improvement.