Authority to Operate (ATO)

Definition

An ATO is granted by an Authorizing Official after a system completes its Risk Management Framework (RMF) assessment, a package of security controls, test results, a Plan of Action & Milestones, and a continuous-monitoring strategy. Without an ATO, a system can sit fully built but legally unable to operate on DoW networks. Variants include Interim ATO (IATO), Conditional ATO (cATO), and Continuous ATO.

Why It Matters

ATO timelines are notorious for slipping programs. Proposals that credibly address RMF, cATO pipelines, and DevSecOps posture have a real discriminator.

Example

A software-defined mission system that cleared a cATO with the Air Force's Platform One could push new releases weekly instead of waiting months for per-release approval.

Related Terms