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Speedometer-Cable Shrinkage

Keywords: fractional design, Taguchi design, two-level design, dispersion effects.


The data set comprises the results of a saturated 215-11 fractional factorial with 4 observations per run. There were 15 controllable factors. The responses are the proportional shrinkage of four samples taken from 3000-foot lengths of speedometer cable manufactured at each set of conditions. The objective was to reduce the post-extrusion shrinkage of the speedometer casing.

Variable Description

A line OD
B liner die
C liner material
D liner line speed
E wire braid type
F braiding tension
G wire diameter
H liner tension
I liner temperature
J costing material
K coating die type
L melt temperature
M screen pack
N cooling method
O line speed
y1 shrinkage value of first sample
y2 shrinkage value of second sample
y3 shrinkage value of third sample
y4 shrinkage value of fourth sample

Note: the data actually give columns for -L, -J, -I, -E, -C and -O as in Box (1988).


Data File (tab-delimited text)


Quinlan, J. (1985). Production improvement by application of Taguchi methods. Amer. Supplier Inst. News, special symposium edition, 11-16.
Box, G. E. P. (1988). Signal-to-noise ratios, performance criteria and transformations. Technometrics 30, 1-17.
Nelder, J. A., and Lee, Y. (1991). Generalized linear models for the analysis of Taguchi-type experiments. Applied Stochastic Models and Data Analysis 7, 107-120.
Lee, Y., and Nelder, J. A. (1998). Generalized linear models for the analysis of quality-improvement experiments. Canadian Journal of Statistics 26, 95-105.




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