Lecture Control Charts Reference Lean Six Sigma Pocket Toolbook

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					Lecture: Control Charts

Reference: Lean Six Sigma Pocket Toolbook




All control charts follow the same form:

All control charts begin as a ___ chart


All control charts have ____ horizontal lines


Two horizontal lines are the _______ control limit and the ______
control limit

A third horizontal line is the _______ line, which is the _______ of the
plotted data


Horizontal lines are typically __- sigma from the center line




1            Developed for QUAN6610 by Dr. Jim Grayson
Control Chart Mechanics


     X-Bar R Control Chart

     Formulas – see page 127-128;

     Calculate limits



     Interpret chart


     Process Capability

     Formulas – see pages 138-140



     P Control Chart

     Formulas – see page 132

     Calculate limits


     Interpret chart


Interpretation

All control charts are interpreted in the same way – there are two
elements to a process being in control:
1. ________________
2. ________________


In-C______ vs. In-S______

A chart said to be “in control” is also p___________ and
r___________ but not necessarily c_____________.




2            Developed for QUAN6610 by Dr. Jim Grayson