  Previous studies of the physics potential of LEP2 indicated that with the
design luminosity of 500 inverse picobarn one may get a direct measurement of
the mass of the W-boson with a precision in the range 30 - 50 MeV. This report
presents an updated evaluation of the estimated error on the mass of the
W-boson based on recent simulation work and improved theoretical input. The
most efficient experimental methods which will be used are also described.
