Compared with the others above, this calculator requires an impressive profiling of the company’s current situation for three different areas: production server, development and test lab, and desktop virtualization.
From that data and for all these scenario, the tool provides a very deep analysis of the TCO, the entity of the investments (up to 3 years) and the ROI.
Another interesting aspect is the comparative calculation between Microsoft products (both Hyper-V and Virtual Server) and competition, with consideration for all the software licensing, the storage space cost, the third party backup software and more.
But probably the biggest selling point of this product, which is free of charge, is that the model, the methodology and the statistical data to define the average values is provided by IDC.
Everybody assume that each vendor’s TCO/ROI calculator analyzes the numbers to confirm that virtualization is a desirable investment and that its own technology offers the best quality/price ratio.
Nonetheless it would be interesting comparing the VMware and Microsoft calculators to see if their reports match on some aspects (like the As Is TCO) and which one is the most near a real-world scenario where all the data is known.
Update: VMware is (obviously) unhappy with this calculator.
The company took one month to review the application and now published a long list of presumed inaccuracies.
We’ll wait the Microsoft’s answer on this one.