<p>What: Calculating cumulative effect of individual tolerances on final assembly fit.</p>

<p>Methods:</p>
<ol>
<li>Worst-case (simplest, most conservative)</li>
<li>RSS (Root Sum Square, more realistic)</li>
<li>Monte Carlo simulation (most accurate)</li>
</ol>

<p>A good rule: design tolerance 30-50% tighter than required to account for stack-up.</p>

<p>Full guide: https://www.mfgabc.com/guides/tolerance-stackup-analysis.html</p>

<hr>
<p>有没有同行遇到过同样的问题？分享一下经验。</p>