Ruminate: To engage in contemplation.
However, I am a strong advocate of service class offerings that are typically associated with IaaS. What is "as a service" with no service classes?
Below I illustrate how you can design your clusters as part of your service class offering. These would feed into your vCloud Director Provider vDCs. The gold offering would include the latest model servers, tier 1 storage, and N+2 cluster redundancy. Silver and Bronze would use older equipment, tier 2 and tier 3 storage, and N+1 cluster redundancy.
There are infinite possibilities for vCloud Director service class solutions when working at the cluster level, but make sure to design within the framework of your infrastructure budget.
Additional service bundles can include consumption models, resource guarantees, restart order, management offerings, and packages. This gives your IT business partners a broad offering of service levels to meet their business requirements.