The JSA Classification Matrices are the basis for determining the appropriate category for Lab positions. In assigning a position to a specific class, multiple factors are assessed in a consistent fashion as documented in the Matrices. Positions are evaluated based on factors such as: the scope of the position; the levels of independent action; problem solving; judgment and initiative exercised in performing the work; reporting relationships; the impact of errors; the nature of personal contacts; supervisory responsibility; and knowledge, experience, and skills required.