1. A method of minimizing compressor use in an HVAC system for an IT space, the method comprises: configuring an HVAC system to cool an IT space; providing a control system to operate the HVAC system, the control system having software configured to forecast economization mode minimum achievable X-Factor for a future portion of a predetermined period of time along with tracking cumulative X-Factor for a past period of the predetermined period of time, thereby identifying future time that must be augmented with compressor operation to achieve user selected X-Factor in aggregate over the period of time, the predetermined period of time having user selected start date, which may be in the past, and user selected duration having an end date in the future; providing at least one parameter to the control system, the at least one parameter including X-Factor history and period weather forecast(s); setting temperature set points for each forecast interval; and analyzing the temperature set points according to maximum and minimum temperature parameters for the IT space, with intervals with set points violating the maximum temperature parameter being designated as intervals for which the compressor will operate while intervals with set points violating the minimum temperature parameter are assigned the minimum temperature set point.