EWMA Chart in Excel
Use the EWMA Chart when you have one sample and want to detect small shifts in performance.
The EWMA (exponentially weighted moving average) chart's performance is similar to the Cusum chart.
Example of an EWMA Chart created in the QI Macros for Excel
- Watch EWMA Chart video
- Cusum charts can also be used to detect small shifts in a process
- Shewhart Control Charts
- Control Chart Quick Reference Card (PDF, 238 KB)