Published: April 26, 2021

This instruction provides policy regarding operational availability as a primary measure for readiness of naval systems, subsystems and equipment; and to provide definitions and equations for calculating operational availability and identifying sources of data for calculating and monitoring operational availability.

Operational availability provides a measure of time or probability that a system’s capabilities will be available for operational use when needed. Operational availability is a critical, dominant element of the overall capability a system provides. It determines the real and sustainable capability that system users can realistically achieve in an operational environment within planned resource levels. Early and consistent focus on operational availability benefits resource sponsors and program managers. It helps sponsors balance real capabilities and total costs.

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