1. A method comprising: storing in a data storage unit performance test data for a plurality of physical servers comprising real test results obtained from observing physical server performance in each of a plurality of virtualization computing performance categories for each of a plurality of virtualization computing equipment configurations; at a computing device, receiving data describing a set of requirements for virtualization computing services for a computing hardware platform to be built, wherein the received data indicates a total number of virtual machine processes required corresponding to a number of instances of virtual desktop users or virtual servers, an amount of memory to be allocated for each instance, and a percentage of expected memory over-commitment, wherein memory over-commitment represents an amount of memory beyond what is physically provided by one or more physical servers for each instance; at the computing device, identifying virtualization computing equipment configurations among the plurality of virtualization computing equipment configurations from a plurality of hardware platforms that are capable of satisfying the set of requirements based upon the received data; determining for each identified virtualization computing equipment configuration, a measure of efficiency for each of the plurality of performance categories based on the set of requirements and the virtualization computing performance test data, wherein the measure of efficiency for a given performance category is based on one or more high threshold levels, one or more low threshold levels, or one or more high threshold and low threshold levels, with each threshold level corresponding to a particular score; weighting each measure of efficiency for a corresponding performance category; generating an overall performance efficiency for each virtualization computing equipment configuration based upon a combination of weighted measures of efficiency; and ranking each identified virtualization computing equipment configuration based on the overall performance efficiency to indicate how a particular virtualization computing equipment configuration for a particular hardware platform compares to other virtualization computing equipment configurations for other hardware platforms, across the plurality of performance categories.