The Concept of Desirability

Z targets, so Z different scales of measurement must be compared.

The four steps to desirability:

1.: Translate (continuous or discrete) scales into unit-less desirability scales.
2.: Assign desirability 1 to "best possible realisation".
Assign desirability 0 to "unacceptable realisations".
Intermediate values to intermediate results ("desirability function" d).
3.: Combine individual desirabilities, continuous and/or discrete, to a one-dimensional quality measure ("desirability index" D).
4.: Maximise D in $\mbox{$I \! \! R$ }$ !

Close collaboration of statistician and expert required!

Dipl.-Stat. Detlef Steuer
1999-10-04