What is the primary evaluation tool used to assess a Soldier's qualifications for promotion?

The primary evaluation tool used to assess a Soldier's qualifications for promotion is the Enlisted Record Brief (ERB). The ERB is a vital document that summarizes a Soldier's career information, including military education, assignments, awards, and other factors that contribute to their promotion eligibility. It provides a comprehensive overview of a Soldier's performance and potential, making it crucial for promotion boards to make informed decisions.

The ERB is updated regularly, capturing all relevant achievements and qualifications, which ensures that the information presented reflects the Soldier's current status and readiness for promotion. This tool not only assists promotion boards in reviewing a Soldier's background but also helps Soldiers keep track of their own careers and identify areas for improvement.

Other options, while relevant to a Soldier's career, do not serve as the primary evaluation tool for promotion. The Soldier's Guide provides general information but lacks the personalization and specific career details present in the ERB. The Non-Commissioned Officer Evaluation Report focuses on evaluating the performance of non-commissioned officers rather than enlisted Soldiers in general. Army Knowledge Online is a platform used for various training and administrative purposes but is not an evaluation tool for promotions.