The document discusses managing heterogeneous environments including both physical and virtual infrastructure, platforms, and applications from various vendors. It outlines the key capabilities needed in an operational support system for a cloud platform, including configuration management, service automation management, virtualization management, provisioning, monitoring, asset management, request management, service level management, image lifecycle management, performance management, and incident/problem management. It also discusses requirements for self-service portals, service catalogs, automated provisioning, topology creation and deployment, platform/virtualization management, usage metering and accounting, multi-tenancy, security, standards, migration, hybrid cloud management and integration between on-premise and off-premise systems and applications.