  When the measurements from the FCC-ee become available, an improved
determination of the standard-model "input" parameters will be needed to fully
exploit the new precision data towards either constraining or fitting the
parameters of beyond-the-standard-model theories. Among these input parameters
is the electromagnetic coupling constant estimated at the Z mass scale,
alpha_QED(mZ). The measurement of the muon forward-backward asymmetry at the
FCC-ee, just below and just above the Z pole, can be used to make a direct
determination of alpha_QED(mZ) with an accuracy deemed adequate for an optimal
use of the FCC-ee precision data.
