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Out-of-Control tests¶

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QXL Stat Tools Tab > Control Charts

These tests detect a specific pattern of the data plotted on a Control Chart. Each pattern suggests the presence of a special cause of the process variation.

You can select in the options which tests should be run by Quantum XL.

Test #1¶

A point that exceeds control limits (more than 3 standard deviations from the center line).

This test is applicable for all Control Charts.

OOC1

Test #2¶

9 consecutive points on the same side of the center line.

This test is applicable for all Control Charts.

OOC2

Test #3¶

6 consecutive points, all increasing or all decreasing.

This test is applicable for all Control Charts.

OOC3

Test #4¶

14 consecutive points alternating up and down.

This test is applicable for all Control Charts.

OOC4

Test #5¶

2 out of 3 points in the zone A (> 2 Standard Deviations from the center line).

This test is applicable for the Xbar chart and the Individuals chart.

OOC5

Test #6¶

4 out of 5 points in the zone B (> 1 Standard Deviations from the center line on the same side).

This test is applicable for the Xbar chart and the Individuals chart.

OOC6

Test #7¶

15 consecutive points in the Zone C (within 1 Standard Deviation from the center line, either side).

This test is applicable for the Xbar chart and the Individuals chart.

OOC7

Test #8¶

8 consecutive points > 1 Standard Deviation from the center line on either side.

This test is applicable for the Xbar chart and the Individuals chart.

OOC8