====== L-S 관리도 (L-S Control Chart) ======
===== 정의 =====
===== 중심선 및 관리한계선 =====
  * $$ \mathrm{UCL} = \left( \frac{\overline{L}+\overline{S}}{2} \right) + \left( \frac{1}{2} + 3 \frac{e_{3}}{d_{2}} \right) \overline{R} = \overline{M} + A_{9} \cdot \overline{R} $$
  * $$ \mathrm{LCL} = \left( \frac{\overline{L}+\overline{S}}{2} \right) - \left( \frac{1}{2} + 3 \frac{e_{3}}{d_{2}} \right) \overline{R} = \overline{M} - A_{9} \cdot \overline{R} $$

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  * [[관리도]]
  * [[관리도 계수]]
  * [[관리도 계수표]]