STATISTICAL methods of controlling quality of output have now been tried out in many branches of industry, the War in particular having provided a strong impetus with its demand for large-scale ...

Methods of statistical process control were briefly investigated in the field of educational measurement as early as 1999. However, only the use of a cumulative sum chart was explored. In this article ...

BEFORE the War, quality control methods of the statistical type were to be found in comparatively few industries. The War itself saw them introduced, frequently under Government auspices, into a wide ...