Abstract
With the continuing growth of the public cloud service market, enterprises increasingly face more complex and more frequent decisions to optimize their IT infrastructure. When it comes to the question of on-premise versus cloud deployment and provider selection in the latter case, cost figures are needed for fact-based decisions. In the public cloud case, enterprises needs to comprehend and apply a diversity of tarification systems to compare potential cloud providers. This effort slows down decision processes and reduces the number of considered alternatives. Therefore, we present an Open Tariff Model which provides a unified cost model to support cost estimates for IT deployments in the public cloud by mapping diverse provider tariffs into a common structure. Such a model helps to quickly compare provider costs for cloud deployments or provides input to analyses of the cloud service market, among other applications like cloud brokerage.
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