The ultimate decision is precision
U.S. Airmen assigned to the 20th Component Maintenance Squadron precision measurement equipment laboratory flight perform pre-checks on equipment at Shaw Air Force Base, S.C., July 21, 2016. The PMEL laboratory is divided into three sections physical/dimensional, waveform analysis and DC/low frequency electrical measurements. (U.S. Air Force photo by Airman 1st Class Christopher Maldonado)