In quality control, what does the 'X' symbolize when plotting tests?

In quality control, the 'X' that is used when plotting tests represents a data point. This notation allows for the visualization of individual measurements or values collected from the testing process, enabling analysts to assess performance, identify trends, and recognize variations within the dataset. Each 'X' on a plot corresponds to a specific measurement or test result, which is crucial for evaluating the quality or effectiveness of a process or material.

Understanding how to interpret these data points is essential for maintaining accurate quality control throughout the earthwork process. By analyzing clusters of 'X's, one can determine if the measurements are within acceptable limits, suggest areas for improvement, or identify any deviations from expected results. This is fundamental in implementing quality assurance practices and ensuring that standards are met effectively.