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Metrology

Offset

Offset is the difference between a nominal value (for an artifact) or a target value (for a process) and the actual measured value.

NCSL in­ter­na­tion­al

Formerly known as the National Conference of Standards Labor­at­or­ies (NCSL). NCSL was formed in 1961 to “promote cooperative efforts for solving the common problems faced by measurement labor­at­or­ies.

Natural (physical) constant

A natural constant is a fundamental value that is accepted by the scientific community as valid.

Metrology

Metrology is the science and practice of measurement