W and Z Measurements with the Initial CMS Data

The CMS analysis strategy for the early data measurement of the inclusive W and Z production cross-sections using their electron and muon decay modes, with an integrated luminosity of 10\,pb$^{-1}$, is outlined. This measurement is expected to be among the first from the LHC and so the ultimate calibration and alignment precision will not have been obtained. To mitigate the impact of this on the analysis, focus is placed on the use of robust selections and data-driven methods. Preliminary results are presented, which were obtained using data from a detector fully simulated with miscalibration and misalignment on the level expected in the initial data-taking