Control charts
Highly specialized plots, (graphics),
or charts indicating if a process performance, mean
(average or X-bar), standard
deviation (sigma), and range, are
with in a certain specification limits using upper
control limits and/or lower
control limits. You can also use Pre-Control
to establish control limits on control charts.
A requirement in SPC and Six
Sigma.
Control charts aide in the determination as
to if a process’s influences are of common
cause (normal) or unique or special
cause, (strange, rare). Mostly used in statistical
process control, (SPC) as a part of any DFSS,
(Design for Six Sigma), DMAIC,
(define, measure, analyze, improve, and control) or ISO
standards.
Control charts typically use a histogram
or distribution chart as well as X bar, (mean), and R bar, (range),
charts. They may also use other chart types depending on the data type, discrete,
(sometimes called attribute data), or variable
data.
Similar to a trend chart with boundaries
and zones
established from the data. Control charts break away intrinsic process or
procedure variation, (common cause),
from variation that is not part of the process or procedure, (special
cause).
Our Six Sigma SPC, (statistical process
control), software is only $150.00 and saves you time and money. For
an example of control charts see our ZeroRejects
features page.
