Page 271 - Lean six sigma demystified

Voice of Customer

Line Graph
Line Graph

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

Until the processes that generate the output become the focus of our efforts, the full
power of these methods to improve quality, increase productivity, and reduce cost may
not be fully realized
—The AIAG Statistical Process Control Manual (second edition)

Once you’ve made improvements, you’ll want to sustain (i.e., control) them to
ensure that you stay at the new level of performance. Otherwise, you’ll gradu-
ally slip back to the old levels of performance. That’s why you will want a
process control system.

CHAPTer OBJeCTiVeS

In this chapter, you will
• Learn the control phase of DmaiC

• Learn how to diagram process flows
• Learn how to monitor performance with control charts and histograms
• Learn how to develop a control plan

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