Exercise 211
(Exercises 12 to 15 in Advanced
Copyediting Practice for Chinese Technical Writers
by Ted Knoy)
[ Exercise 12]
- It
is a fact that engineers select an appropriate
variable and the transformed observations are
treated as though they are normally distributed
with a constant variance.
- Those
methods neither require previous knowledge of
how the variables are distributed nor are the
censored data stipulated to be available.
- The
procedure for analyzing singly censored data in
a replicated experiment is as follows:
S tep 1: Distinguish the experimental results
as the uncensored (complete) data and the censored
(incomplete) data.
Step 2: The relationship between the two values
must be found by performing regression analysis.
Step 3: Estimate the two variables.
Step 4: The estimated censored data must be ranked.
Step 5: Find the regression models for response
avaerage and standard deviation for each trial.
Step 6: The factors that significantly affect
the response average and standard deviation must
be identified.
Step 7: The optimal factor/level combination must
be determined.
-
The derived model provides an extension of an
earlier concept [1] and helping industrial managers
in determining a feasible number of replenishments.
-
Experimental design is used in this method to
arrange the design parameters and noise factors
in the orthogonal arrays and computing the signal-to-noise
(SN) ratio based on the quality loss for each
experimental combination.
- The
relative importance of each response can be transformed
into a fuzzy number through means of the establishment
of a formal scale system that can be used to convert
linguistic terms into their corresponding fuzzy
numbers and to express the relative importance
of each response by the linguistic term.
- The
Taguchi approach provides a combination of experimental
design techniques with quality loss considerations
and that the average quadratic loss is minimized.
- The
conventional approach happens to be cumbersome,
complicated and wastes too much time.
- The
two-step procedure not only identifies those factors
that significantly affect the signal-to-noise
(SN) ratio, but also the levels that maximize
SN are found.
- Logethetis
(1988) proved that strong non-linearities exist
and the B technique was also recommended for use
by him.
- This
work not only proposes an effective procedure
based on the rank transformation of responses
and regression analysis, but also the singly censored
data are discussed.
- The
following steps describe the procedure:
Step 1: Calculate the normalized decision matrix.
Step 2: The weighted normalized decision matrix
is calculated.
Step 3: The ideal and negative-ideal solution
is determined.
Step 4: Calculate the separation measures.
Step 5: The relative closeness to the ideal solution
is calculated.
Step 6: The preference order is ranked.
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