The document discusses modeling infrastructure capacity for growth using Sumerian Capacity Planner. It describes the challenges capacity planners face in provisioning enough resources to support increasing demand without overprovisioning. Sumerian's solution creates a baseline of the current infrastructure and allows modeling the impact of adding different workload types over time. It identifies any resource shortages and ways to address them. Client results show using predictive analytics based on real data gives confidence to optimize resource use and reduce costs by only investing in needed additional capacity.