Control charts are used in manufacturing to identify variation, inconsistency, and possible process issues. They help show whether a process is operating within expected limits or whether certain measurements require further investigation.

The goal of most manufacturing processes is to produce consistent parts that meet specification. In this assignment, I used Excel to organize measurement data, calculate summary statistics, and create control charts for bolt length measurements.

I isolated the bolt length data and calculated the center line, upper control limit, and lower control limit. These limits helped show how the bolts were performing over time and whether the process remained stable.

Any measurement outside the control limits would indicate a possible out-of-control condition. This would help identify where the manufacturing process may need adjustment, inspection, or further analysis.