What is ISO 7870‑1 - Control charts about?
ISO 7870‑1 is an international standard that focuses on control charts and general guidelines. ISO 7870‑1 presents key elements and the philosophy of the control chart approach and identifies a wide variety of control charts (including those related to the Shewhart control chart, those stressing process acceptance or online process adjustment, and specialized control charts).
ISO 7870‑1 presents an overview of the basic principles and concepts of control charts and illustrates the relationship among various control chart approaches to aid in the selection of the most appropriate part of ISO 7870 for given circumstances.
Who is ISO 7870‑1 - Control charts for?
ISO 7870‑1 on control charts and general guidelines is useful for:
- Production unit of a company
- Service operator
- Engineers and technicians
- Administrators and managers
Why should you use ISO 7870‑1- Control charts?
The control chart is a graphical display of data from the process, which allows a visual assessment of the process variability and stability. At defined intervals, subgroups of items of a specified size are obtained and the value of a characteristic or feature of the items is determined. The data obtained are typically summarized using appropriate statistics and it is these statistics that are plotted on the control chart.
Control charts are a fundamental tool of statistical process control (SPC). ISO 7870‑1 provide a simple graphical method that can be used to:
- Indicate if the process is stable, i.e., Operating within a stable system of random causes, also known as inherent variability, and referred to as being in a “state of statistical control”
- Estimate the magnitude of the inherent variability of the process
- Compare information from samples representing the current state of a process against control limits reflecting this variability, to determine whether the process variability has remained stable or is reduced or increased
- Identify, investigate, and possibly reduce/eliminate the effect of special causes of variability, which can drive the process to an unacceptable level of performance
- Aid in the regulation of a process through the identification of patterns of variability such as trend runs, cycles, etc
What’s changed since the last update?
BS ISO 7870‑1:2019 supersedes BS ISO 7870‑1:2014. BS ISO 7870‑1:2019 includes some technical changes concerning BS ISO 7870‑1:2014. These include:
- Added Annex A, specifying the conventions for drafting control charts
