Variables sampling plan

A variables sampling plan is an acceptance sampling technique. Plans for variables are intended for quality characteristics that are measured in a continuous scale. This plan requires the knowledge of the statistical model e.g. normal distribution. The historical evolution of this technique dates back to the seminal work of Wallis (1943). The purpose of a plan for variables is to assess whether the process is operating far enough from the specification limit. Plans for variables may produce a similar OC curve to attribute plans with significantly less sample size. A variables sampling plan is an acceptance sampling technique. Plans for variables are intended for quality characteristics that are measured in a continuous scale. This plan requires the knowledge of the statistical model e.g. normal distribution. The historical evolution of this technique dates back to the seminal work of Wallis (1943). The purpose of a plan for variables is to assess whether the process is operating far enough from the specification limit. Plans for variables may produce a similar OC curve to attribute plans with significantly less sample size.