Final answer:
The question seems to refer to EVALs in a military context, but the reference provided is about the civil service paygrade system which does not directly apply to military enlisted personnel evaluations.
Step-by-step explanation:
The question appears to be inquiring about the performance evaluation or “EVALs” process for enlisted personnel within a structured paygrade system. However, the reference provided pertains to the U.S. Federal General Schedule (GS) for civil service, not military enlisted personnel. The General Schedule is a pay scale for civil servants and includes fifteen grades, with each grade reflecting different required competencies and education levels. EVALs in the context of the military would pertain to a different system, the Navy Performance Evaluation System for example, where evaluations for enlisted personnel often require signatures from multiple levels of leadership.