40
2002).
Refers
to
control
II
stage,
there
are
five
measurement
categories such as:
(i)
Measures of conformance (to given specifications)
(ii)
Response time (lead-time, cycle time)
(iii) Service levels (degree of availability)
(iv)
Repetition (frequency of recurring events such as rework)
(v)
Cost (Quality, internal and external failure costs)
2.4.1.1.5 Phase III: Control (III)
Objectives of control III phase (corrective action) are a regulation to
maintain a certain performance level and do improvement (in aiming at
reducing variability or raising the average performance level). It
performs feedback of critical importance for stabilizing and improving
the process and control.
It should be performed in a constructive
–
not
punitive
–
manner.
Constructive
feedback
makes
people
feel
that
they
matter and encourages involvement and commitment.
2.5 Six Sigma
2.5.1 Definitions of Six Sigma
The
Six
Sigma
is
originally
a
company
wide
initiative
at
Motorola
for
breakthrough improvement in quality and productivity (see Appendix A for
details). In addition, Manuel, L and Marklund, J theorized a broad definition of
Six Sigma programs such as:
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