Mathematical principles of statistical quality control.

• Main Author: Michael, J.
• Other Authors: Timell, T. (Supervisor)
• Format: Others
• Language: en
• Published: McGill University 1955
• Subjects: Mathematics.
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110025

In an industrial process we usually set up a standard far the quality of a given kind of product. That is, we lay down specifications for weight, thickness, diameter, breaking strength, finish, etc. by which an article can definitely be classed as conforming or nonconforming, even if in many cases the specifications are partly arbitrary. We then try to make all units of the product conform with this standard. However, it is impossible to make all units exactly alike. Therefore, there is bound to be some variation in the quality of the product.