hard · Project Management Professional predictive

Ironwood Grid uses automated control charts to monitor the precision of grid component manufacturing. The current chart shows all data points falling within the Upper Control Limit (UCL) and Lower Control Limit (LCL). However, the last eight consecutive points are positioned above the mean.

Which action is most appropriate?

  1. Continue monitoring since all points are within the statistical boundaries
  2. Redesign the process to reduce common cause variation
  3. Recalculate the control limits to account for the new baseline
  4. Investigate the process to identify the special cause of variation

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