The James Webb Space Telescope optical telescope element mirror
components, 18 individual primary mirror segment assemblies (PMSA), the
secondary mirror (SM), tertiary mirror (TM), and Fine Steering Mirror,
have all been fabricated. The performance of the optical telescope (OTE)
based on the as-measured optical components is combined with alignment
tolerances and the on-orbit alignment process to predict the imaging
performance of JWST. The best estimate of the wavefront error, Strehl
ratio and Encircled Energy stability is presented.