ISO 7870‑3 gives guidance on the uses of acceptance control charts and establishes general procedures for determining sample sizes, action limits and decision criteria. An acceptance controls chart should be used only when:
An acceptance control chart is typically used when the process variable under study is normally distributed; however, it can be applied to non-normal distribution. The examples provided in this document illustrate a variety of circumstances in which this technique has advantages, these examples provide details of the determination of the sample size, the action limits, and the decision criteria.
ISO 7870‑3 on the control chart is useful for:
An acceptance control chart combines consideration of control implications with elements of acceptance sampling. ISO 7870‑3 is an appropriate tool for helping to make decisions concerning process acceptance.
ISO 7870‑3 is a useful tool for covering this wide range of approaches in a logical and simple manner. It distinguishes between the inherent variability components randomly occurring throughout the process and the additional location factors which contribute at less frequent intervals.
ISO 7870‑3 helps you to frame an acceptance control chart for your products. ISO 7870‑3 does this by defining the acceptable process level (good quality products) and rejectable process level (bad quality products). An acceptance control chart based on the guidelines of ISO 7870‑3 doesn’t create a sharp divide between acceptable process level and rejectable process level to accommodate for products that be of borderline quality. This helps you to evaluate whether the products are fit for the consumer market or not. ISO 7870‑3 helps you to design an acceptance control chart that is suited for your production operations and improves your overall production quality.
BS ISO 7870‑3:2020 supersedes BS ISO 7870‑3:2012. BS ISO 7870‑3:2020 includes some technical changes compared to BS ISO 7870‑3:2012. These include:
ISO 7870-3