PERT
<span class="equation-text" contenteditable="false" data-index="0" data-equation="O"><span></span><span></span></span> 乐观预估
1
<span class="equation-text" contenteditable="false" data-index="0" data-equation="N"><span></span><span></span></span> 标称预估
3
<span class="equation-text" contenteditable="false" data-index="0" data-equation="P"><span></span><span></span></span> 悲观预估
12
<span class="equation-text" contenteditable="false" data-index="0" data-equation="\mu = (O+4N+P)/6"><span></span><span></span></span> 任务的期望完成时间
4.2
<span class="equation-text" contenteditable="false" data-index="0" data-equation="\sigma = \frac{P-O}{6}"><span></span><span></span></span> 任务的概率分布标准差
1.8
