Systems and methods for managing capacity over-commitment in a resource provisioning environment. The method comprising collecting historical data about capacity usage in a resource provisioning environment and failure statistics from an operational database, in addition to prior service commitments due to previously contracted service level agreements (SLAs) stored in a SLA repository; calculating equivalent capacity for the resource provisioning environment based on a defined residual benefit goal, and other business goals instrumented by way of a policy engine; and determining whether placing requested virtual resources on one or more hosts is feasible taking into account anti-collocation constraints that prohibit placement of two or more virtual resources on same host.