After completing the same mail sorting task for five hours, you notice you are making more errors than earlier in the shift. What is the MOST appropriate action?

QUALITY CONTROL and SELF-AWARENESS are critical mail handler competencies. This question tests several behaviors: RECOGNIZING PERFORMANCE DEGRADATION: fatigue-related error increases are normal and expected in physically repetitive roles; the ability to recognize when your own performance is declining is a sign of professionalism and self-awareness, not weakness; TAKING APPROPRIATE ACTION: authorized breaks exist precisely to restore concentration and reduce errors; rest is a legitimate performance tool, not laziness; brief stretching can help restore concentration and reduce physical strain; TRANSPARENCY WITH SUPERVISION: informing your supervisor serves multiple purposes: quality of outgoing mail may need to be checked; work may be redistributable to maintain standards; it demonstrates honesty and professionalism; it may trigger a systematic review if others are experiencing similar fatigue; WHAT NEVER TO DO: hiding errors by deliberately missorting mail would be a serious integrity violation; it undermines mail reliability and is dishonest. SPEEDING UP when already making errors typically increases errors — the solution to fatigue-induced mistakes is not increased pace but improved focus, often achieved through brief rest. VEA 475 PRINCIPLE: USPS values workers who maintain quality standards, know their own limitations, communicate honestly, and take appropriate steps to maintain performance — not those who simply push through problems silently or, worse, conceal quality issues.