For energy-aware performance optimization it is not only essential to have accurate and energy correct power measurements, but in order to short-cut the optimization process, it is also important to have reli- able energy models. However, there is a lack of a methodological approach for evaluating these. In this work a flexible workflow to compare power measurement techniques and power estimation techniques in general is designed and implemented. The workflow comprises three stages: those are (i) the generation of an application trace / energy trace, (ii) the processing of the trace to create a phase profile, and (iii) the visualization of the correlation between the considered power estimation and power measurement results. Furthermore this work includes the utilization of the workflow to evaluate the accuracy of power estimates based on energy models proposed in the literature and in particular the comparison of those to the HAEC energy measurement test system “artemis” as reference. Finally it includes a discussion of possible enhancements to the evaluated energy models.