The document discusses service level agreements (SLAs) as a new acquisition model that can help address budget constraints. Some key points: 1) Under an SLA, a vendor provides infrastructure and operations to deliver a service, while the customer makes a stable, multi-year commitment to acquire the service. 2) The document provides DigitalGlobe's EnhancedView SLA as an example, which guarantees capacity, accuracy, timeliness and availability of satellite imagery to the NGA for 10 years at a lower cost than ownership. 3) SLAs are argued to enable better performance than traditional acquisitions by providing stable requirements, funding, staffing, and managed innovation at lower cost and risk.