1. A computer-implemented method for evaluating total cost of ownership (TCO) of a system, the method comprising: obtaining reference values associated with respective aspects of a TCO measurement model, the TCO measurement model configured for use in measuring TCO, the reference values reflecting a reference TCO determined for a reference system; mapping actual expenses to the TCO measurement model, the actual expenses identified as associated with a system whose TCO is to be evaluated; performing an analysis that includes at least comparing the actual expenses to the reference values according to the mapping; and recording a result of the analysis that indicates at least whether the TCO of the system differs from the reference TCO.