1. Useful tool for continuous monitoring and improving analytical quality of laboratory test performance.

2. Provide early working of specific problems related to equipment, reagent and/or personnel.

3. Help for evaluation of corrective actions initiation.

4. Enhance confidence in the quality of results among Laboratory, Doctor and Patients.

5. Establish objective evidence of Laboratory Quality Management System.

6. Act as a check for efficacy of Internal Quality Control Procedure.