Speed. Delivery. Agility. Recognized as the Department of Defense's constructive disruptor for space acquisition, the Space Development Agency (SDA) will quickly deliver needed space-based capabilities to the joint warfighter to support terrestrial missions through development, fielding, and operation of the National Defense Space Architecture. SDA capitalizes on a unique business model that values speed and lowers costs by harnessing commercial development to achieve a proliferated architecture and enhance resilience. SDA will deliver a minimum viable product - on time, every two years- by employing spiral development methods, adding capabilities to future generations as the threat evolves.