DoD Handbook- Calibration and Measurement Requirements

Interpretive guidance: Occasionally it is beneficial to the developer and/or the reviewer of the CMRS to develop a pictorial view of the parametric flow. A flow chart, with the subsystem parameters mapped to the system parameters, mapped to the SE parameters, mapped to either the appropriate service’s approved calibration procedure or the calibration standards, mapped to the national standards or a physical constant. Generally, the parametric mapping (i.e. traceability) will be satisfied with either an appropriate service’s approved calibration procedure or to a first tier calibration standard which has an approved procedure. Rarely does the parametric map have to document a flow to the national standards or a physical constant. The parameters required for interchangeability necessary to be documented will be driven down to the lowest level of repair documented in the LSA where measurements are required.