TS ISO 7966

TS ISO 7966 is a standard that provides guidance on the use of acceptance control charts and explains general procedures for determining sample sizes, action limits and decision criteria. In statistical process control, the method is used to organize acceptance decisions in a consistent way, based on pre-defined rules applied to sample results.

In general technical terms, acceptance control charts differ from conventional control charts because they are aimed at accept/reject decisions rather than routine monitoring of process stability alone. A statistic calculated from a sample is compared with specified action limits, allowing a lot, batch or other decision unit to be assessed against an agreed rule. This makes the technique particularly relevant where inspection effort must be managed carefully and where sample-based decision making is preferred over continuous examination.

Sampling, limits and decision logic

The scope also includes examples showing situations in which the technique has advantages. Here, sample size, action limits and decision criteria are interdependent elements: together they affect the sensitivity of the chart, the practical burden of inspection and the reliability of the acceptance decision. In that sense, acceptance control charts are not just a graphic display, but a combined framework for sampling design and decision making.

• Provides guidance on the use of acceptance control charts.
• Sets out general procedures for determining sample sizes.
• Explains how action limits and decision criteria are established.
• Includes examples of situations where the technique is advantageous.
• Issued as an equivalent TS edition to ISO 7966:1993 and later withdrawn.