What is Statistical Quality Control? The animation to the left is surely not Statistical Quality Control. Statistical Quality Control, or SQC, can be divided into two areas: 1. Acceptance Sampling 2. Statistical Process Control Acceptance Sampling Acceptance sampling involves testing a random sample (not random testing as the animation portrays) and deciding whether to accept an entire lot based on the quality of the random sample. Statistical Process Control Statistical process control (SPC) involves testing a random sample of output from a process to determine whether the process is performing within a preselected range. When the tested output exceeds the preselected range, it is a signal to adjust the process to force the output back into the acceptable range.

Business Week, 2002