Is MIL-STD-105E still in use?

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Acceptance Sampling

Yes. Although the military standard itself was phased out in 1989, it's civilian counterparts, ANSI Z1.4 or ISO 2859 (which are essentially the same) still exist. In practice these sampling plans are widely used by many industries.

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Quality has to be caused, not controlled.

— Philip Crosby

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Practical Acceptance Sampling (2nd Edition) is a hands-on introduction to the inspection of products and services for quality assurance using statistically-based sampling plans.

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Methods are illustrated using SQC Online, Microsoft Excel, and online calculators.

From the Glossary

Alarm Zones

The zones in an ordinary 3-sigma control chart are beyond the upper control limit (3,∞), and below the lower control limit (-∞, -3).

To specify the alarm zone as the area between the warning limits and control limits, enter a=2, b=3.
In a control chart with 0.001 probability control limits (3.09 "sigma") and 0.025 warning limits (2.24 "sigma"), the rule "two consecutive points between the control and warning limits" is given by: k=2, a=2.24, b=3.09.
The zones are usually symmetric around the center line. For example: [-3,-2] and [2,3].

Is MIL-STD-105E still in use?

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The Perfect Companion to SQC Online

From the Glossary