Which of the following best describes a Key Performance Parameter (KPP)?

A Key Performance Parameter (KPP) is a critical element that is essential for the operational effectiveness of a system or capability. It represents a necessary condition that must be met in order for the system to achieve its intended operational goals. KPPs are defined during the systems acquisition process and are typically tied to key operational requirements that have a significant impact on mission success. These parameters help ensure that the final product meets the essential needs of users in the field and fulfills its intended role.

In the context of systems acquisition, identifying and monitoring KPPs is crucial because they guide design, development, testing, and evaluation processes. By focusing on these critical parameters, acquisition managers can prioritize resources, make informed decisions, and ensure that the project stays aligned with its primary objectives.

Other options such as non-critical performance attributes, optional project goals, or methods to evaluate training efficacy do not capture the essence of KPPs, which emphasizes their mandatory nature for achieving operational success.