Statistical process control

Kaoro Ishikawa, from Japan, originally put together a set of seven quality control tools to use in quality circles (small group activities). The seven tools, when used together or individually, are used by first-line teams for quality improvement.

These tools are equally useful in all other functions; to help identify and guarantee quality issues and also to prioritize issues on which to focus. One of the seven quality control tools is one that Ishikawa developed himself, the Ishikawa Diagram, or more commonly known as the fishbone diagram.

There are much more than seven quality tools; some books use the “Quality 75” – 75 quality control tools! The 7 QC tools discussed in the Key 11 workbook have been assembled for the following reasons:

  • They are easy to use at all levels in the organization, especially at team level, which is the main focus of Key 11
  • They are all visual techniques, which enable us to see the whole situation at a glance. All, apart from the fishbone diagram, are about data.

The most important aspect to understand when using the 7 QC tools is why they are used (the practical situation), and what they are used for (the “story” they tell).

Please find more information here.