**1. Introduction**

Laboratory quality control encompasses the integral and essential monitoring of investigative analytics to find out investigative and interfering flaws, miscalculations and blunders that appear or materialize during the analytical procedures and conclusively avert the erroneous reporting of results to the patient. Quality control is usually used to monitor the accomplishment of a test, and, to find the accuracy. Levey and Jennings were the pioneers of using statistics for the standardization and calibration of analytical procedures. The substances used for quality control are known as quality control (QC) materials. They are usually aliquoted in a stable form. Nowadays, most laboratories purchase the QC material from reputed companies instead of making them. The QC material is usually in a powdered form and can be stored for more than a year. The concept of statistical quality control decreased to a great extent the cost of quality control by the help of the method of sampling.
