Based on intuition, we might assume that performance suffers as workload increases. This is only partially correct. As indicated in Figure 1, as workload increases from low to moderate, performance improves to an optimal level.

• 凭直觉我们认为，随着压力的增加，工作质量会下降，但这只说对了一部分，如图所示，当工作负荷从较低逐步上升到适中水平时，工作质量将达到一个最佳状态。