1.1 ,This guide covers facilities and procedures for benchmarking neutron measurements and calculations. Particular sections of the guide discuss: the use of well-characterized benchmark neutron fields to calibrate integral neutron sensors, the use of certified-neutron-fluence standards to calibrate radiometric counting equipment or to determine interlaboratory measurement consistency, development of special benchmark fields to test neutron transport calculations, use of well-known fission spectra to benchmark spectrum-averaged cross sections, and the use of benchmarked data and calculations to determine the uncertainties in derived neutron dosimetry results.