Data on an experiment concerning the production of leaf springs for trucks. A \(2^{5-1}\) fractional factorial experiment with 3 replicates was carried out with objective of recommending production settings to achieve a free height as close as possible to 8 inches.
A data frame with 48 observations on the following 6 variables.
furnace temperature - a factor with levels
+
-
heating time - a factor with levels
+
-
transfer time - a factor with levels
+
-
hold-down time - a factor with levels
+
-
quench oil temperature - a factor with
levels +
-
leaf spring free height in inches
P. McCullagh and J. Nelder (1989) "Generalized Linear Models" Chapman and Hall, 2nd ed.