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I-MR-R/S (Between/Within) ChartTest for Special Causes Results - I Chart |
The Individuals (I) chart assesses whether the process location is in control. Each test for special causes detects points beyond the control limits and specific patterns in the data plotted on the I chart.
Example Output |
Test Results for MR Chart of Subgroup Means TEST 1. One point more than 3.00 standard deviations from center line. Test Failed at points: 14
Test Results for R Chart TEST 1. One point more than 3.00 standard deviations from center line. Test Failed at points: 8 |
Interpretation |
For the injection molding data, no subgroups failed the tests for special causes on the I chart; therefore there is no evidence for lack of control in process location.