Operational Safety—The condition of having acceptable risk caused by a system, end item, or subsystem when employing that system, end item, or subsystem in an operational environment. This requires the identification of hazards, assessment of risk, determination of mitigating measures, and acceptance of residual risk. Operational Suitability—The degree to which a system or end item can be placed satisfactorily in field use, with consideration given to availability, compatibility, transportability, interoperability, reliability, safety, human factors, documentation and training requirements among others.
OSS&E Baseline Document—Describes the collection of information that provides the essential characteristics and information that must be known to safely and effectively operate, upgrade, maintain and sustain a specific system or end item. Generally it references the location of other documents that support the OBD.
Product Group—A set of products that use similar or same production processes, have similar physical characteristics, or share customer segments, distribution channels, pricing methods, etc.
Systems Engineering Plan—A living document in which periodic updates capture the program’s current status and evolving SE implementation and its relationship with the overall program management effort. Subsystem—A functional grouping of components that combine to perform a major function within an element such as electrical power, attitude control, and propulsion.