<Dd> ISO 17025 <Dl> <Dd> "A calibration certificate (or calibration label) shall not contain any recommendation on the calibration interval except where this has been agreed with the customer . This requirement may be superseded by legal regulations ." </Dd> </Dl> </Dd> <Dl> <Dd> "A calibration certificate (or calibration label) shall not contain any recommendation on the calibration interval except where this has been agreed with the customer . This requirement may be superseded by legal regulations ." </Dd> </Dl> <Dd> "A calibration certificate (or calibration label) shall not contain any recommendation on the calibration interval except where this has been agreed with the customer . This requirement may be superseded by legal regulations ." </Dd> <Dd> ANSI / NCSL Z540 <Dl> <Dd> "...shall be calibrated or verified at periodic intervals established and maintained to assure acceptable reliability ..." </Dd> </Dl> </Dd>

Linear programs are performed in an environment of uncertainty