Calibration  

     Common standards include:

• ISO 17025:2005—General Requirements for Calibration Laboratories
• ISO 9000—Quality Systems Management
• ISO 14000—Environmental Management
• 21 CFR Part 210/211—FDA Regulations concerning GMP (Good Manufacturing Practices) Quality Systems
• 21 CFR Part 110—FDA Regulations concerning Food Industry GMP's.

Metrology  is the science of measurement.

 Calibration is the process where metrology is applied to measurement equipment and processes to ensure conformity with a known standard of measurement, usually traceable to a national standards board.