EWMA chart

by | Jul 3, 2021 | Homework Help

The manager of the injection molding department has asked you to make a EWMA chart for a maintenance operation-weekly mold changes. The table of data below shows the number of mold changes for the last 45 weeks. Construct EWMA charts using r = 0.33.

Identify any statistical signals on the charts or other trend like patterns.

What can you report to the manager about the mold-changing process?

Make sure your report includes the following:

  • estimates of the process mean and standard deviation,
  • exponentially weighted moving averages,
  • control limits and centerlines,
  • EWMA Control Charts,
  • and comments to the manager.

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