This standard is based on N15.41 (see clause 2@ Normative References)@ which provides the general principles of a measurement control program. This N15.51 standard@ although limited to the principal elements of a measurement control program for an analytical chemistry laboratory supporting nuclear fuel cycle activities@ has elements that are also applicable to other analytical laboratories. Measurement control elements specific for bulk measurements (mass and volume) from processes and specific process sampling techniques are not addressed in detail in this standard nor are special analytical techniques such as mass spectrometry and calorimetry. These subjects are treated in other standards of this series.