John F. Kennedy Space Center
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KSC Reliability

Reliability (R) is the probability an item (e.g., system, subsystem, or component) will perform its intended function with no failure for a stated period of time (or number of demands or load) under stated environmental conditions. Other words, reliability is the probability an item will be in an uptime state (i.e., fully operational or ready to perform) for a stated mission.

Maintainability (M) is the probability a failed item will be restored or repaired to a specified condition within a given period of time. Other words, maintainability is the probability an item in a downtime state will be returned to an uptime state within a given period of time.

Availability (A), a function of Reliability and Maintainability (R&M), is the probability a repairable item will perform its intended function at a given point in time (or over a specified period of time) when operated and maintained in a prescribed manner. Other words, availability is the probability of an item’s mission readiness, an uptime state with the likelihood of a recoverable downtime state.

Ideally from an RMA Plan, the RMA team performs three major functions, namely, (1) Design for RMA, (2) RMA verification, and (3) Analytical physics. For specific RMA tasks click here.

Foundations
Policies
Processes
Standards
Tools
Guidelines And Techniques Over The Life Cycle

Decision Making

Systems Engineering

Reliability Physics

Success-Space Modeling

Failure-Space Modeling

Failure-Data Resources

Bayesian Method

Uncertainty

Miscellaneous