Jeff_Chou(威望:197)
(江苏 苏州)
汽车制造相关 Six Sigma-er
- 寄蜉蝣于天地 渺沧海之一粟
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Lower control limit
The lower control limit (LCL) is the horizontal reference line drawn a specified number of standard deviations below the center line. The formula is:
d2 (ni) s - kd3 (ni)s
where:
d2 = a constant used to estimate the standard deviation. Its value is read from a table.
ni = size of the ith subgroup
k = number of standard deviations from the center line Minitab uses to draw the line. By default, k =3.
d3 = a constant used to estimate LCL and UCL. Its value is read from a table
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Jeff_Chou (威望:197) (江苏 苏州) 汽车制造相关 Six Sigma-er - 寄蜉蝣于天地 渺沧海之一粟
赞同来自:
The lower control limit (LCL) is the horizontal reference line drawn a specified number of standard deviations below the center line. The formula is:
d2 (ni) s - kd3 (ni)s
where:
d2 = a constant used to estimate the standard deviation. Its value is read from a table.
ni = size of the ith subgroup
k = number of standard deviations from the center line Minitab uses to draw the line. By default, k =3.
d3 = a constant used to estimate LCL and UCL. Its value is read from a table
s = the pooled standard deviation by default.
If LCL < 0, LCL = 0