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Capacity Management is the science, and the art, of balancing performance, cost, and resources. You would like to get the best possible performance with the least amount of resources. But given the billing complexities of cloud infrastructure, you also want to manage which model are you using to maximize your return on investment (ROI) Cost consists of the billing models you use, such as reserved vs. on-demand VMs. Cost is also characterized by how you group resources. Infrastructure debt is accumulated when the team keeps allocating the wrong infrastructure.