You can perform infrastructure planning by adding or removing Hyperconverged Infrastructure (HCI) nodes in vSAN enabled clusters and running What-If scenarios. vRealize Operations Manager displays the cost, time remaining, and capacity remaining for CPU, memory, and disk space in the scenario results.
Where You Find What-If Analysis - Hyperconverged Infrastructure
From the Home screen, select What-If Analysis under Optimize Capacity in the left pane. From the What-If Analysis screen, select Infrastructure Planning: Hyperconverged. To run a What-If scenario click Add HCI Nodes or Remove HCI Nodes.
How What-If Analysis - Hyperconverged Infrastructure Works