Daily documentation and evaluation of quality control are vital to the detection of errors.
One of the most commonly used methods for documentation is the Levey-Jennings control chart (L-J chart).
- In 1931, Dr. Walter Shewhart, a scientist at the Bell Telephone Laboratories, proposed the application of statistical-based control charts to monitor industrial manufacturing processes.
- In 1950, S. Levey and E.R. Jennings applied Dr. Shewhart's control charts to the clinical laboratory.
