As noted in the March 2000 ASAC report, it is the combination of the antenna performance and receiver sensitivity and frequency coverage that determines the capabilities of ALMA. A further discussion of questions concerning the frequency bands and their priority, the total power stability, the WVR specs, the polarization requirements, the calibration accuracy, and the receiver configurations (principally single sideband versus double sideband operation) may be found therein. Certain of these issues were revisited in September 2000 in the wake of the restriction of the ALMA baseline project to four receiver bands earlier this year, and are discussed further below.