What is a scatter plot used for in Six Sigma?

A scatter plot is a graphical representation that displays the relationship between two numerical variables. In the context of Six Sigma, it is used primarily to identify patterns, trends, and correlations between these variables. By plotting data points on a graph where one variable is represented on the x-axis and the other on the y-axis, it becomes easier to visualize how changes in one variable may correspond to changes in the other. This analysis is crucial for understanding potential relationships that could impact processes, leading to more informed decisions during improvement initiatives.

Using a scatter plot can help teams pinpoint whether there is a positive, negative, or no correlation between variables, which is essential for root cause analysis and effective problem-solving in Six Sigma methodologies. Analyzing these relationships facilitates deeper insights into processes and the factors that may affect performance, making it a valuable tool in any Six Sigma project.