Page 253 - Lean six sigma demystified

Voice of Customer

Line Graph
Line Graph

Pa reto Char t
Pareto Chart
7 Countermeasures nal y si s
Root Cause
Root Cause Analysis
A
Counter
measures
c h a p t er NUMBER OF NUMBER OF INSTALLATIONS INSTALLATIONS BEFORE USL Problem Solving
BEFORE
EF
O
AFTER
AFTE
OF NUMBER OF INSTALLATIONS ONS AFTER R USL B BEFORERE AFTER
Reducing Variation
with Six Sigma

Chapter 5 dealt with reducing defects. Defects are counted or attribute data
(i.e., integers). With defects, the product or service is either bad or good; it
either has a scratch or it doesn’t. In this chapter we’ll look at Six Sigma
methods for reducing deviation (i.e., variation). Deviation involves measured
or variable data (i.e., decimals). Measured data include time, length, width,
height, weight, volume, and money. This means that a part can be too big or
too small to fit properly. It means that a service or process can take too long.
It means that the wait time in a supermarket, retail outlet, or call center can
be too long.

CHAPTer OBJeCTIVeS

In this chapter, you will

• Learn the Six Sigma improvement process for reducing deviation
• Learn and apply the Six Sigma tools for reducing deviation
• Learn how to conduct a capability study

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