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